Here's how it works, what it actually costs you, and the timing mistake that stops people getting one.
The mechanics, in one paragraph
You make a large one-time payment against your principal. Your lender then recalculates — re-amortizes — your monthly payment based on the new, smaller balance, spread across the months you had left anyway.
Your interest rate doesn't change. Your payoff date doesn't change. Your payment goes down.
That's it. There's no new loan, no appraisal, no title work, no closing costs, and generally no credit check. Compared with a refinance it's almost embarrassingly simple.
What it actually costs you — and lenders say this themselves
Here is the part most articles skip, and it matters more than anything else on this page.
A recast is not the cheapest thing you can do with a lump sum. It's the thing that gives you the most monthly breathing room.
If you put $50,000 against your principal and don't recast, your payment stays the same, more of it goes to principal every month, and your loan finishes early. You save the most interest that way.
If you put the same $50,000 in and do recast, your payment drops, your payoff date stays exactly where it was, and you save less interest than you would have.
Chase says it plainly on its own website: a recast reduces or eliminates the interest savings gained from making extra principal payments, and the main benefit is lower monthly payments rather than interest savings.
So the question isn't "is a recast good." It's what you need more of — money each month, or a shorter loan. Those are different goals and they pull in opposite directions.
Who can't get one
This is where most people stop, so check it before you plan anything.
Government-backed loans generally cannot be recast. FHA, VA and USDA are all out. That is not a servicer preference — it is how those programmes work.
Conventional loans backed by Fannie Mae or Freddie Mac are the usual candidates, subject to your servicer agreeing to do it. Jumbo loans sometimes qualify at the lender's discretion.
Also typically excluded: interest-only loans, option ARMs, and second liens.
And not every servicer offers recasting at all, even on an eligible loan. That first phone call is the whole ballgame.
What it takes
A minimum lump sum. Most servicers want $5,000 to $10,000, though some set it considerably higher — one major bank publishes $20,000, and a few require $50,000 or a percentage of the balance.
A fee. Typically $150 to $500. A few large banks reportedly charge nothing. Ask.
A clean payment history, and often a seasoning period — commonly two to six on-time payments before they'll consider it.
Patience. Expect 30 to 60 days from request to a new payment, sometimes longer.
And most servicers allow only one recast in a twelve-month period.
The mistake that costs people the whole thing
Request the recast BEFORE or AT THE SAME TIME as you make the lump-sum payment.
Most servicers require the request in advance. An unsolicited principal payment does not automatically trigger a recast — it simply reduces your balance while your payment stays exactly where it was.
People send $30,000, wait for a smaller bill, and it never arrives. The money isn't lost — it's working against your principal — but the monthly relief they were counting on doesn't happen, and by then they may have missed the window.
Call first. Ask for the recast form. Then send the money.
When a recast genuinely makes sense
You've come into money and you'd rather have breathing room than a shorter loan. An inheritance, a bonus, the sale of a business. If monthly cash flow is what's tight, this converts a lump sum directly into it.
You bought before you sold. You're carrying a mortgage sized for a down payment you couldn't make yet. When the old house closes, the proceeds go against the new loan and the payment drops to where it should have been — without a bridge loan.
You have a rate you'd never get again. This is the big one right now. Millions of households hold mortgages between 2.75% and 4%. A refinance means surrendering that. A recast doesn't touch it. If your goal is a smaller payment and you're sitting on a rate from 2020, a recast is very likely the only sensible route.
And you don't want another credit inquiry or another set of closing costs.
The move most people miss: recast, then keep paying the old amount
Everything you've read about recasting — here and everywhere else — assumes that once your payment drops, you start paying the smaller number.
You don't have to.
Recast, then keep writing the same cheque you were writing before.
Say your required payment was $1,800 and the recast brings it to $1,480. Keep paying $1,800. That extra $320 has to go somewhere, and it goes straight to principal, every month, automatically.
Here's the part worth sitting with. Your cash flow hasn't changed at all. Same balance, same rate, same dollars leaving your account each month. So you finish on the same date you would have finished if you'd never recast — and you pay the same interest.
Which means the standard trade-off, the one every article on this subject leads with, simply doesn't apply to you. You gave up nothing. For the price of the fee, you bought something.
What you bought is a floor.
Because on any month you can't manage $1,800, you are allowed to pay $1,480. Not as a hardship arrangement, not as a missed payment, not as something you have to phone anyone about. That is your contractual minimum now. You pay it, you're current, nothing happens.
Then next month you go back to $1,800.
You've permanently lowered the bar without lowering your effort.
Who this matters most for
If your income is commission, this is close to essential. Two strong months and two thin ones is a normal year, not a crisis — but a fixed mortgage payment doesn't know that. A recast gives your bad quarter somewhere to land.
If you're self-employed, same picture. A client pays late, a contract ends, an invoice slips sixty days. None of that is failure and all of it hits your mortgage payment.
If your work is seasonal — construction, anything tied to weather, anything that dies between Thanksgiving and February — you already know which months you dread. This is the single cleanest answer to them.
And if you have a bonus-heavy year and a lean one, or a spouse whose income comes and goes, the same logic holds.
The whole reason people in these situations get talked out of paying their mortgage down aggressively is that they can't afford to be locked into a bigger obligation. This removes the lock and leaves the acceleration in place.
A lower floor, and you carry on paying the ceiling until the month you can't.
When it doesn't
If it would drain your emergency fund, stop. Money in your house is not reachable when the furnace goes. You'd be converting liquid savings into equity you'd have to borrow against to get back. The section above lowers your required payment, which helps in a lean month — but it does not put cash in your hand. That is a different problem and it comes first.
If you have higher-rate debt, that comes first. A 3.5% mortgage is rarely the expensive thing in a household.
If you can't meet the minimum, this isn't available to you yet — and there are other things you can do in the meantime.
If you know you'd spend the difference. The whole case above rests on continuing to pay the old amount. If the lower bill quietly becomes the new normal, you will finish later and pay more interest than if you'd never recast at all. Be honest with yourself about which of those you are.
The part nobody connects — and it changes the trade-off entirely
Everything above treats a recast as a straight swap: you give up some interest savings to get a lower payment. That's the standard framing and every article on this subject stops there.
It's only true if the freed-up money disappears into ordinary spending.
Watch what happens when it doesn't.
A recast lowers your required payment — call it $320 a month. In a Blend, that $320 doesn't sit in a checking account. It lands against the line of credit, which means the line's balance comes down faster than it would have.
And the line recovering faster means the next chunk you send to first-mortgage principal comes sooner.
That's the piece. It isn't a one-off saving of $320 a month. It shortens the cycle. Every harvest from the line to the first mortgage arrives earlier than it would have, and every one of those lands on a balance that's still large enough for the reduction to matter.
Think of it as a raise that you never see and never spend. The household's income didn't change. Its expenses didn't change. But one fixed obligation got smaller, permanently, and every dollar of that difference now goes to work in a structure built to compound it.
Which turns the standard objection on its head. Yes, a recast on its own costs you some of the interest saving you'd have had from paying down the principal and leaving the payment alone. But that assumes the payment relief goes nowhere. Run it back through the line and the money comes home, faster each cycle.
We have not seen anyone else make this connection, and we think that's because it requires running both structures on the same household — the recast and the Blend — rather than treating them as separate products from separate people.
How much difference it makes depends entirely on your numbers — your balance, your rate, how far into the loan you are, how much cash flow you actually have. It is not a figure we'd put on a web page, because on your loan it would be wrong. It's a thing to model on a call, with your figures in front of both of us.
Work out what it would do on your loan
Free, no signup. Your balance, your rate, your remaining term and the lump sum you're considering. It shows you the new payment, what you'd save, and — the comparison most calculators leave out — what happens if you make the same payment and don't recast at all.
Then, if you want to know what to do with the money it frees up, that's a different conversation and we're happy to have it.
Frequently asked
Does recasting hurt my credit?
Generally no. Most servicers don't run a credit check for a recast — there's no new loan being underwritten.
Will my payment go down forever?
Your principal and interest portion will. If your loan has an escrow account, taxes and insurance can still move, so your total bill can change. And on an adjustable-rate mortgage the rate itself can move.
Can I recast more than once?
Usually once in any twelve-month period, though this varies. Ask your servicer.
Can I recast an FHA or VA loan?
Generally not. Those programmes don't permit it. If you need a lower payment on a government-backed loan, a refinance is typically the only route — and that means giving up your rate.
Is recasting better than refinancing?
Different tools. A refinance replaces your loan and can change your rate, for better or worse, with closing costs attached. A recast keeps everything and only lowers the payment. If your current rate is good, a recast is almost always the better answer.
How long does it take?
Usually 30 to 60 days from request to a new payment. Keep paying the old amount until they tell you otherwise.
What if my lender says no?
Some servicers simply don't offer it. Your options then are a refinance, or making principal payments without a recast and accepting that the payment stays the same while the loan finishes sooner.