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Pay extra on the mortgage, or recast it?

See what a lump sum does if you keep your payment the same, what a recast does to your monthly payment, and what a regular extra payment saves.

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Cover of When Rates Go Up. The American Debt Handbook

This calculator goes with When Rates Go Up. The American Debt Handbook by JP O'Connor. The book explains what the numbers mean and what to do next.

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If your mortgage is fixed, the Fed didn't touch it

About half of US mortgages carried a rate below 4% in early 2026, according to FHFA data, and most are fixed for 30 years. A Fed rise doesn't change those payments at all. That's why this book is mostly about your other debts. But if you bought or refinanced recently at 6% to 7%, extra payments on the mortgage are worth a real look.

Extra payment and recast are different things

An extra payment goes straight off the principal. Your required payment stays the same, so the loan finishes early and you pay less interest. Ask your servicer to apply it to principal.

A recast takes a lump sum off the balance and then recalculates your monthly payment over the years you have left. Same rate, same end date, lower payment. Servicers typically charge a fee of a few hundred dollars and may want a minimum lump sum. FHA, VA and USDA loans generally can't be recast.

Why a recast can still be the smart move

A lower required payment frees cash every month and gives you room if money gets tight. If that freed cash goes straight onto a 22% credit card, it can beat paying extra on a 6.8% mortgage by a wide margin.

Refinancing isn't the answer for most people right now

With 30-year rates near 6.8% in September 2026, refinancing a 3% or 4% mortgage would raise the payment. A recast is the way to lower a payment without giving up the rate.

Check this one. Servicers set their own recast rules: whether they offer it, the fee, and the minimum lump sum. Ask yours in writing before you send the money. Check your loan documents for any prepayment penalty. They're rare on recent home loans but not impossible.

Get the full handbook

Cover of When Rates Go Up. The American Debt Handbook

United States · 150 pages · JP O'Connor

When Rates Go Up.

The American Debt Handbook

Your fixed mortgage didn't change. Your credit cards, HELOC and ARM did.

  • Why paying the minimum on a $7,500 card can take nearly 20 years
  • Avalanche or snowball: see exactly what the easier path costs
  • The HELOC payment shock when the draw period ends, and how to shrink it now
  • What to say when you call your card issuer to ask for a lower APR

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