How to Recast Your Mortgage (6 Steps)

A mortgage recast is one of the quietest tools in home finance, and one of the most useful when it fits your situation. If you have come into a lump of money, from a bonus, an inheritance, the sale of another property, or years of patient saving, and you want to turn it into a lower monthly payment without the cost and paperwork of a refinance, a recast is very likely the move you are looking for. By the end of this rundown you will know exactly what a recast does, how to request one in six clear steps, and how to tell whether it beats the alternatives for your money.

Most people have never heard of a recast, and the ones who have often confuse it with a refinance. They are not the same thing, and the difference is worth real dollars. A refinance swaps your whole loan for a new one, with a new rate, fresh underwriting, and thousands in closing costs. A recast keeps everything about your loan the same except the balance, and charges you a small fee, commonly an illustrative $250 to $500, to recalculate the payment. If you are content with your interest rate but want to ease your monthly budget after a windfall, that distinction is the whole story. For the broader decision of when replacing your loan pays off instead, our refinance break-even breakdown covers that path, and you can price your own recast in the companion calculator below.

What a mortgage recast actually is

A recast is a re-amortization of your existing mortgage after you pay down a chunk of the balance. Amortization is just the schedule that spreads your loan across its term so that each equal monthly payment covers the interest due plus enough principal to reach zero by the end. When you hand your servicer a large one-time payment and ask for a recast, it recalculates that schedule on the smaller balance, keeping your interest rate and your remaining number of months exactly as they were. The result is a new, lower monthly payment for the rest of the loan.

The three things that stay fixed are what make a recast distinctive. Your rate does not change, so you neither gain nor lose ground on the interest rate itself. Your term does not change, so your payoff date is the same day it was before. Only the balance shrinks, and because a smaller balance spread over the same months needs a smaller payment, your monthly bill drops. Nothing about the loan agreement is rewritten; the lender simply resets the payment to match the new principal.

That is why a recast is so cheap compared with a refinance. You are not applying for new credit, so there is no credit pull, no income verification, no appraisal of your home, and no title work. There is no closing table and no rate lock. The servicer is performing a calculation on a loan you already hold, and it charges a modest fee to do it. Understanding this framing matters, because it tells you when a recast is the right tool: when you like your loan and only want the payment to come down after putting money toward the balance. All dollar figures in this rundown are illustrative and depend on your own loan.

Recast versus refinance versus extra payments

Three different moves can follow a lump sum, and they do genuinely different things, so it helps to line them up before you choose. A recast lowers your required monthly payment and keeps your rate and payoff date the same, for a small fee. A refinance replaces the loan to change your rate or term, which can lower the payment too but costs thousands and only makes sense if the new rate justifies it. Straight extra principal payments, with no recast, keep your payment the same and shorten the loan, saving the most total interest and reaching a paid-off home the soonest.

The clean way to pick is to name your goal. If your goal is a lower rate, a recast cannot help, because a recast never touches the rate; that is refinance territory, and our step-by-step refinance rundown walks that path, while our refinance vs recast breakdown weighs the two moves head to head. If your goal is a lower required payment while keeping the rate you already have, a recast is the direct answer, especially when today’s market rates sit above your current rate, so refinancing would actually raise it. If your goal is to be debt-free sooner and to squeeze out every dollar of interest, keep the payment where it is and let the extra principal shorten the term instead.

A subtle point ties the three together. A recast and a straight prepayment use the exact same lump sum and pay down the exact same principal; the only difference is what happens to the payment afterward. The recast lowers it and holds the payoff date; the prepayment holds the payment and pulls the payoff date closer. You can even combine them: recast to lock in a lower required payment for safety, then voluntarily keep paying the old, higher amount to shorten the loan anyway, with the flexibility to drop back to the lower required payment if money ever gets tight. Our early-payoff breakdown covers the prepayment side of that trade in depth.

Before you start

A recast is simple, but a little preparation keeps it smooth. Here is what to have in hand and what to expect before you begin the steps.

• The lump sum, ready to send. Know the amount you can commit to principal without draining your emergency fund, since the money is locked into home equity once applied.
• Your servicer’s contact details and your loan number. The servicer, not the original lender, processes the recast, so find the company you actually pay each month.
• A rough idea of your balance, rate, and remaining term. These three numbers let you estimate the new payment before you call, using the companion calculator below.
• Time estimate: a few phone or portal minutes to confirm eligibility and the fee, then one to two billing cycles for the new payment to take effect.
• Difficulty: low. There is no underwriting, no appraisal, and no closing, so the hardest part is confirming your loan qualifies.

Treat the first two steps below as the gate. If your loan is not eligible or you cannot meet the minimum lump sum, the rest does not apply, and you would redirect the money into extra principal instead. Once eligibility is confirmed, the remaining steps are mostly a matter of choosing an amount and submitting the request.

How your payment falls as the lump sum grows

Before running the steps, it helps to see the core relationship a recast trades on: the bigger the lump sum you apply, the lower your re-amortized payment, because a smaller balance is spread over the same remaining months. The chart below shows illustrative payments on a $300,000 balance at 6.5 percent with 25 years left, at four different lump sums.

The relationship is close to linear because the two things that would bend it, the rate and the number of months, are held constant in a recast. Every dollar of principal you remove comes straight off the balance the payment has to cover, so the payment steps down in step with the lump sum. This is also why the minimum lump sum matters: a small payment produces a small drop, which is part of why servicers set a floor. Use the chart as intuition, then price your own loan in the companion calculator, because your balance, rate, and remaining term set your exact numbers.

Step 1: Confirm your loan is eligible for a recast

Before anything else, confirm that your specific loan can be recast, because eligibility is the gate that decides whether the rest is even possible. Not every mortgage qualifies. Most conventional loans owned by the major secondary-market buyers can be recast, but government-backed loans, including FHA, VA, and USDA mortgages, generally cannot, and the rules for jumbo loans vary by lender. Some servicers do not offer recasting at all, even on loans that would otherwise be eligible, and some limit how many times you can do it over the life of the loan.

The key is to ask the right company. Your servicer, the business you send your monthly payment to, is the one that processes a recast, and its policy governs, even if a different lender originated your loan or if your loan has been sold since. Call the servicer or check its online portal and ask directly whether your loan is eligible for a recast, sometimes called a re-amortization or a principal curtailment with re-amortization. Get the answer before you plan around it, because assuming eligibility is one of the most common ways a recast plan falls apart.

Watch out for the loan-type trap in particular. Borrowers with FHA or VA loans sometimes assume a recast is available because it is such a simple operation, then discover their loan type is excluded and are left deciding between a refinance and straight prepayment instead. If your loan is not eligible, that is not the end of the road: applying the same lump sum as extra principal still saves interest and shortens the loan, it simply will not lower your required payment. Confirm the loan type and the servicer’s policy first, and only then move on.

Step 2: Get your servicer’s minimum lump sum and fee

Once eligibility is confirmed, get the two numbers that shape the whole decision: the minimum lump sum your servicer requires and the fee it charges to recast. Servicers set a minimum because re-amortizing for a trivial amount is not worth the processing effort and barely moves the payment. A figure often cited illustratively is somewhere around $5,000 to $10,000, but it varies widely, and some servicers instead express the minimum as a percentage of your principal that the payment must reduce. There is no universal number, so the only reliable minimum is the one your servicer states.

The fee is the other number, and it is what makes a recast so much cheaper than a refinance. Most servicers charge a flat processing fee, commonly cited in an illustrative range of about $250 to $500, with no origination charge, no appraisal, and no title work, because you are keeping your existing loan rather than replacing it. Ask whether the fee is paid separately or deducted from the funds you send, and confirm there are no other charges. Because the fee is so small relative to the monthly saving, it usually pays for itself within a month or two, but you still want the exact figure in writing.

Watch out for policies that hide inside the fine print. Some servicers cap how often you can recast, some require the loan to be current with a clean recent payment history, and some will not recast within a certain window after origination. A few also require that the lump sum be applied first and the recast requested separately, in a specific order. Ask about all of these while you have the servicer on the line, so a detail you did not know does not stall the request after you have already sent the money.

Step 3: Choose your lump sum amount

With the minimum and the fee known, decide how large a lump sum to apply, because that single number sets how much your payment falls. The math is direct: the payment drops in near proportion to the balance you remove, since the rate and term stay fixed. You can size the amount from the outcome you want. If your aim is a specific monthly payment, work backward from it; if your aim is simply to put a windfall to work, you might apply the whole amount above your emergency reserve. The companion calculator turns any lump sum into a new payment in seconds so you can test amounts.

The more important part of this step is deciding how much you should apply, not just how much you could. Money sent to a recast becomes home equity, which is safe but illiquid: you cannot easily get it back without borrowing against the house. So keep a healthy emergency fund intact, clear any higher-interest debt first, and capture any employer retirement match before committing a large sum to your mortgage, since those uses usually beat the guaranteed return a recast provides. A recast makes sense with money you genuinely have spare, not money you might need back next year.

Watch out for over-committing to hit a round number. It is tempting to send exactly enough to drop the payment to a tidy figure, but do not empty your cushion to do it. It is also worth remembering that a recast reduces your payment but not your rate, so if your rate is well above today’s market, the same lump sum paired with a refinance might serve you better, a comparison our cost-to-refinance breakdown helps you price. Choose an amount that clears the minimum, lowers the payment meaningfully, and still leaves you liquid.

Step 4: Run your re-amortized payment before you commit

Before you send anything, run the new payment yourself so you know exactly what you are buying, because the whole point of a recast is that lower monthly figure and you should confirm it is worth doing. Re-amortizing is the same payment formula your loan already uses, applied to the smaller balance over your remaining months at your unchanged rate. On an illustrative $300,000 balance at 6.5 percent with 25 years left, the payment is about $2,026; apply a $50,000 lump sum and the balance falls to $250,000, and the re-amortized payment drops to roughly $1,688, a monthly saving near $338. Your own numbers will differ.

Comparing the saving to the fee is the quick sanity check. If a recast lowers your payment by an illustrative $338 a month and the fee is around $350, the fee is repaid in about a month, after which the lower payment is pure monthly breathing room for the rest of the loan. Because the fee is so small next to the recurring saving, the recast almost always clears this bar easily, which is one of its quiet strengths. The companion calculator below computes your new payment, your monthly saving, and how quickly the fee repays itself from three numbers you already know.

Watch out for reading the saving as free money. The monthly payment falls, but you funded that reduction with your own lump sum, which is now locked in the house as equity. The recast does not create savings out of nothing; it converts a pile of cash into a lower payment and a bit less interest over the remaining term. That is a fair trade when you value the cash flow and the money was genuinely spare, but run the number with clear eyes rather than treating the lower payment as a windfall on top of the windfall you already have.

Step 5: Submit the recast request and your lump sum

Once you have confirmed eligibility, the minimum, the fee, and the new payment, submit the recast request along with your lump sum. The exact mechanics vary by servicer, so follow the process it gave you in step two. Commonly you either make the principal payment first and then formally request the recast, or you submit a recast request form and send the funds together with the fee. Some servicers handle the whole thing through their online portal; others require a written request or a phone call. The key is to follow your servicer’s stated order, because doing it out of sequence can leave your lump sum sitting as a plain principal payment with no recast attached.

Be explicit that you want a recast, not just a principal reduction. This is the step where borrowers most often trip: they send a large payment assuming it will automatically lower the payment, but by default an extra payment usually just reduces the balance and shortens the loan without changing the required monthly amount. Say clearly, in writing where possible, that you are requesting a re-amortization of the loan after the principal payment, and confirm the servicer has logged it as a recast. Keep a record of the request, the amount, the fee, and the date.

Watch out for the fee and the funds getting separated. Confirm how the fee is collected, whether it is bundled with your payment or billed on its own, so the request is not held up waiting on it. Also confirm the effective date, meaning which month’s payment will reflect the new amount, and keep paying your current, higher payment until the recast is confirmed. Paying the old amount for an extra month or two while the change processes does no harm, since the overage goes to principal, whereas underpaying before the recast takes effect could trigger a late or short payment.

Step 6: Verify the new payment and reset autopay

After the servicer processes the recast, verify the new payment in writing and update anything that pays your mortgage automatically. Ask for confirmation that the loan was re-amortized, and check your next statement for the new lower monthly payment, the reduced balance, and the unchanged rate and maturity date. The maturity date is the tell that the recast was done correctly: it should be the same payoff date you had before, since a recast never moves the term. If the payoff date changed, or the payment did not drop, contact the servicer, because something was processed incorrectly.

Then reset your autopay to the new amount. If you pay through your bank’s bill pay or the servicer’s autodraft, update the figure so you are not overpaying or, if you had a fixed transfer, so the surplus is handled the way you intend. Overpaying is harmless in that the extra goes to principal, but it defeats the cash-flow purpose of the recast, and an autopay set to the old amount is easy to forget. This is a two-minute administrative step that ensures you actually receive the lower payment you paid a fee to get.

Watch out for assuming the change is instant. A recast typically takes one to two billing cycles to show up, so the lower payment may not begin the very next month. Note the effective date the servicer gives you, and do not lower your payment until the statement confirms the new amount, since paying less before the recast takes effect can register as a short payment. Once the confirmation is in hand and autopay is updated, the recast is complete and the lower payment is yours for the rest of the loan.

What a recast does to your monthly payment

It helps to see the recast trade as a split of your old payment, because the reduction and the remaining payment together make up exactly what you paid before. The chart below breaks the illustrative $2,026 payment on a $300,000 balance into the new lower payment after a $50,000 recast and the monthly cash the recast frees up.

The chart makes the nature of the trade plain. The recast did not shrink the loan’s timeline or its rate; it took a fixed cost, the old payment, and lowered the recurring portion by the freed slice, funded by your lump sum. That freed amount is real monthly cash flow you keep for the whole remaining term, which is the benefit people value most about a recast. What it does not do is speed up the payoff, and the chart quietly shows why: the payment goes down rather than the number of payments. If your priority were a shorter loan, you would leave the payment where it is and let the lump sum shorten the term instead, the trade our early-payoff breakdown lays out.

A worked example, start to finish

Walk one homeowner through all six steps. They have a $300,000 balance at 6.5 percent with 25 years remaining, a rate they are happy with because current market rates sit higher, and they have just received a $60,000 inheritance. They want lower monthly costs, not a faster payoff, and they do not want the expense of a refinance that would also raise their rate. A recast fits the goal precisely. Step one: they call their servicer and confirm their conventional loan is eligible, and that the servicer offers recasting.

Step two: the servicer states a $10,000 minimum lump sum and a $350 flat fee, deducted from the funds sent. Step three: the homeowner decides to keep a $10,000 emergency cushion from the inheritance and apply $50,000 to the loan, comfortably above the minimum. Step four: they run the numbers in the calculator and see the payment fall from about $2,026 to roughly $1,688, a saving near $338 a month, with the $350 fee repaid in about a month, so the recast clearly clears the bar. Over the remaining term, the smaller balance also trims an illustrative $51,000 or so in interest they would otherwise have paid.

Step five: following the servicer’s process, they send the $50,000 principal payment and submit a written recast request, stating clearly that they want the loan re-amortized rather than just a principal reduction, and confirm the $350 fee is handled. Step six: two billing cycles later, their statement shows the new $1,688 payment, a $250,000 balance, the same 6.5 percent rate, and the same maturity date as before. They update autopay to the new amount. The whole thing cost $350 and a couple of phone calls, kept the rate they liked, and turned a windfall into $338 of monthly breathing room for the rest of the loan.

When a mortgage recast makes sense

A recast shines in a specific set of circumstances, and recognizing them tells you when to reach for it. The clearest case is when you like your current interest rate and simply want a lower payment after a windfall. If your rate is below today’s market, refinancing would raise it, so a recast is the only way to lower the payment without giving up the rate you have. A bonus, an inheritance, the proceeds from selling another property, or the profit from a business event are all classic sources of the lump sum that a recast turns into monthly relief.

Another strong case is the buy-before-you-sell situation. Homeowners who buy a new home before their old one sells often take a larger loan than they ultimately want, planning to apply the sale proceeds later. A recast is purpose-built for this: once the old home sells, they drop the proceeds onto the new loan and recast to reset the payment to where it would have been with a bigger down payment, all without refinancing. Some new-construction and portfolio lenders even structure loans with a recast in mind for exactly this reason.

A recast also makes sense when cash flow matters more than payoff speed. If you are approaching retirement, shifting to a single income, or simply want a more comfortable monthly budget, converting spare cash into a permanently lower required payment can be worth more to you than shaving years off a loan you were not straining to pay early anyway. The recast gives you a lower obligation while preserving the option to keep paying more voluntarily. When the goal is breathing room rather than speed, and you value keeping your existing rate, a recast is usually the right tool.

When a recast is the wrong move

Doing this well also means knowing when not to recast, and several situations argue against it. The most common is when your real goal is a lower interest rate. A recast cannot touch your rate, so if market rates have fallen well below yours, a refinance that captures the lower rate may save far more than a recast ever could, even after its closing costs; our refinance break-even breakdown shows how to run that comparison. Recasting when you should refinance leaves the bigger saving on the table.

A recast is also the wrong move when your priority is being debt-free sooner. Because a recast lowers the payment but holds the payoff date, it saves less total interest than applying the same lump sum as extra principal while keeping your payment the same, which shortens the loan. If your aim is to reach a paid-off home as fast as possible and to minimize lifetime interest, skip the recast and prepay directly. The recast trades some of that interest saving for monthly cash flow, which is a fine choice only if the cash flow is what you actually want.

Finally, a recast is unwise if funding it would leave you financially exposed. Money applied to a recast becomes illiquid home equity that you cannot easily reclaim without borrowing against the house. If committing the lump sum would drain your emergency fund, leave higher-interest debt unpaid, or cause you to skip an employer retirement match, those needs almost always outrank the guaranteed but modest return of a lower mortgage payment. A recast is for genuinely spare money, and using money you may need back soon is the wrong move no matter how appealing the lower payment looks.

Common recast mistakes

A handful of predictable errors turn a simple recast into a source of frustration. Recognizing them protects your money and your time.

• Assuming your loan is eligible. Many borrowers plan a recast only to learn their FHA, VA, or USDA loan does not qualify, or that their servicer does not offer recasting. Confirm eligibility with the servicer before you count on it.
• Confusing a recast with an extra payment. Sending a large principal payment does not automatically lower your payment; by default it just shortens the loan. You must explicitly request the re-amortization, in writing where possible.
• Recasting when you should refinance. If market rates are well below your rate, a refinance can save far more, because a recast never changes the rate. Compare both against your goal before choosing.
• Draining your safety net to fund it. Money in a recast is locked into equity and hard to retrieve. Keep your emergency fund and clear higher-interest debt first, since those uses usually beat a recast’s return.
• Expecting a faster payoff. A recast lowers the payment but keeps the same payoff date, so it saves less interest than straight prepayment. If a shorter loan is the goal, do not recast.
• Forgetting to reset autopay. After the recast, an autopay still set to the old amount quietly overpays, sending the surplus to principal and defeating the cash-flow purpose you paid a fee to achieve.

Every one of these traces back to a single misunderstanding: treating a recast as either a refinance or a payoff accelerator, when it is neither. It is a payment-lowering tool that keeps your rate and your timeline, and using it well means matching it to that exact job.

Troubleshooting your recast

Even a straightforward recast can raise questions. Here is how to think through the common ones.

What if my servicer says my loan cannot be recast? Confirm the reason, since it is usually the loan type or the servicer’s own policy rather than anything about you. If a government-backed loan is the obstacle, your realistic alternatives are to apply the lump sum as extra principal, which shortens the loan without lowering the payment, or to weigh a refinance if a better rate is available. The recast door being closed does not waste your lump sum; it just changes which tool you use.

What if I cannot meet the minimum lump sum? The minimum exists because a small payment barely moves the numbers, so if you are short of it, the honest answer is that a recast would not do much anyway. Applying what you have as extra principal is the better use: it still reduces your balance and your interest, and it shortens the loan. You can also wait and combine future windfalls into one payment that clears the minimum later, then recast once.

What if the payment did not drop after I paid? This is almost always the extra-payment-versus-recast mix-up. If you sent a large payment without formally requesting a re-amortization, the servicer likely applied it to principal and left your required payment unchanged, which shortens the loan instead. Contact the servicer, confirm whether a recast was actually logged, and request the re-amortization explicitly if it was not, keeping in mind that some servicers charge the fee and require a separate request.

What if rates drop after I recast? A recast does not lock you out of a future refinance. If market rates later fall well below your rate, you can still refinance the recast, smaller balance to capture the lower rate, running the usual break-even math on the closing costs. The recast and a later refinance are not mutually exclusive; the recast simply improves your cash flow now while keeping the refinance option open for later.

Your recast checklist

Before you commit, work through these steps in order. Save this list and tick each box.

• Confirm eligibility with your servicer. Ask specifically whether your loan type and servicer allow a recast, since not all do.
• Get the minimum lump sum and the fee in writing. Know the floor you must clear and the flat fee, illustratively about $250 to $500, before planning.
• Size your lump sum from spare money. Keep your emergency fund, clear higher-interest debt, and capture any retirement match first.
• Run the new payment and compare it to the fee. Confirm the monthly saving is worth the small fee, using the companion calculator.
• Decide recast versus refinance versus prepay. Choose the recast only if you want a lower payment while keeping your rate and payoff date.
• Submit the request in the servicer’s order, and say recast. State clearly that you want a re-amortization, not just a principal payment.
• Keep paying the old amount until confirmed. Do not lower your payment before the servicer confirms the recast and its effective date.
• Verify the new statement and reset autopay. Check the lower payment, smaller balance, unchanged rate, and same payoff date, then update autopay.

Run your balance, rate, remaining term, and planned lump sum through the companion calculator below to see your new payment and saving before you call your servicer.

The bottom line

A mortgage recast is a small, cheap tool that does one thing well: it turns a lump sum into a permanently lower monthly payment while keeping your rate and your payoff date exactly where they are. Confirm your loan is eligible, get the minimum and the fee from your servicer, choose a lump sum from money you genuinely have spare, run the new payment to be sure it is worth the modest fee, submit the request as a recast rather than a plain principal payment, and verify the change before you rely on it. Do that, and for a fee often measured in a few hundred dollars you convert a windfall into monthly breathing room for the rest of your loan. Just remember what a recast is not: it will not lower your rate, and it will not shorten your loan, so when either of those is your real goal, a refinance or straight prepayment is the better tool.

A note before you act: this rundown is educational general information, not mortgage, financial, or legal advice, and it cannot see your loan the way your servicer can. Every payment, saving, fee, minimum, and percentage in it is illustrative, and your real eligibility, minimum lump sum, fee, and re-amortized payment depend on your loan type, your servicer’s policies, and your own finances, all of which vary and change. Recasting is not available on every loan, and the specific rules governing it differ by servicer. Confirm the current figures and your eligibility with your servicer, and consider speaking with a qualified financial professional, before you commit a lump sum.