Mortgage Recast vs Refinance: Which Saves You More?

When you want a lower monthly payment, two options come up: recasting and refinancing. They sound similar but work in completely different ways, and picking the wrong one can cost you thousands. Here’s how to tell them apart and decide which fits your situation.

The core difference

A mortgage recast keeps your existing loan exactly as it is (same interest rate, same payoff date) and simply lowers your monthly payment after you make a large lump-sum payment toward principal. The lender re-amortizes the smaller balance over the remaining term.

A refinance replaces your loan entirely. You get a brand-new loan with a new interest rate, a new term, a fresh credit check, and a full round of closing costs. The old loan is paid off and gone.

Side-by-side comparison

Feature	Recast	Refinance
Interest rate	Stays the same	Changes to current market rate
Closing costs	None	2–6% of the loan balance
Fee	One-time $150–$500	Thousands in closing costs
Credit check	No	Yes
Payoff date	Unchanged	Resets (new term)
Lump sum required	Yes ($5k–$10k typical)	No
Processing time	30–45 days	30–45 days
Lowers monthly payment	Yes	Sometimes

When recasting wins

Recasting is the better choice when you have a low fixed rate worth keeping. If you locked in a rate of, say, 3.5% a few years ago and today’s rates are 6.5%, refinancing would throw away your great rate. A recast lets you lower your payment using a lump sum while keeping that low rate intact.

Recasting also wins on cost. The fee is a flat $150–$500 versus 2–6% of your balance for a refinance. On a $350,000 loan, that’s a few hundred dollars against $7,000–$21,000 in closing costs.

When refinancing wins

Refinancing makes sense when current market rates are meaningfully lower than your existing rate, typically a drop of at least 0.75 to 1 percentage point. In that case, the new lower rate can save more than enough to cover the closing costs over time.

Refinancing is also your path if you want to:

• Switch from an adjustable-rate to a fixed-rate loan
• Pull cash out of your home equity
• Shorten or lengthen your loan term
• Remove private mortgage insurance

And critically, refinancing doesn’t require a lump sum. If you want a lower payment but don’t have $10,000+ in cash to put down, a recast simply isn’t available to you.

A simple decision rule

Ask yourself two questions:

1. Is my current rate lower than today’s rates? If yes, lean toward recasting: you don’t want to give up that rate.
2. Do I have a large lump sum to apply? If no, recasting isn’t possible, so refinancing is your only payment-lowering option.

If you have a low rate and a lump sum, recasting is almost always the smarter move. If today’s rates are well below yours, run a refinance comparison even if you have cash, since the rate savings might outweigh everything.

Run both scenarios

The only way to know for sure is to compare the actual dollar outcomes for your loan. Our recast vs refinance calculator runs both side by side, and the main recast calculator shows what a lump-sum recast does to your payment and total interest.

Still deciding between lowering your payment and paying off faster? Our guide on whether recasting is worth it digs into the tradeoffs. And if you’re not sure your loan even qualifies, check FHA, VA & USDA recast eligibility first.