Mortgage Recast vs Refinance: How to Compare (With Break-even)

Educational only — not financial advice

If you have a lump sum and want to lower your mortgage payment, you'll typically choose between a mortgage recast (also called re-amortization) and refinancing. Both can reduce your monthly payment, but they work very differently. This page explains the key tradeoffs and how break-even works, then lets you run the exact numbers using the calculator.

Key Takeaways

  • A mortgage recast lowers your required payment after a lump-sum principal payment. Your interest rate and remaining term usually stay the same, and fees are typically small.
  • Refinancing replaces your existing loan with a new one. It can change your rate, term, or both, but usually comes with higher closing costs.
  • Refinance break-even is the time it takes for monthly savings to recover upfront closing costs.
  • The better option depends on rates, fees, term changes, and how long you plan to keep the loan.

What is a Mortgage Recast?

A mortgage recast (sometimes called re-amortization) allows you to make a large lump-sum payment toward your loan principal and then have your lender recalculate your required monthly payment based on the lower balance. Your interest rate and remaining loan term usually do not change, but your monthly payment decreases.

Many lenders charge a small recast fee (often around $150–$500), and minimum lump-sum requirements vary by lender.

What is Refinancing?

Refinancing means replacing your current mortgage with an entirely new loan. You may be able to secure a lower interest rate, change your loan term, or switch loan types. Refinancing typically involves closing costs, which are often around 2–5% of the loan amount.

Because of these costs, refinancing usually makes sense only if the long-term savings outweigh the upfront expense.

Recast vs Refinance — Side-by-Side Comparison

FactorRecastRefinance
Interest rate changeNo changeCan change (new rate)
Loan term changeNo changeCan change (new term)
Typical fees$150–$5002–5% of loan amount
Time to complete1–2 weeks30–45 days
Credit check requiredNoYes
Appraisal requiredNoUsually yes
Monthly payment impactDecreasesCan decrease or increase
Best forLower payment with minimal costRate/term change or major savings

How Refinance Break-even Works

Refinance break-even is the point at which your cumulative monthly savings equal the upfront closing costs. A simple estimate is:

Break-even months = Closing costs ÷ Monthly savings

For example, if refinancing costs $9,000 and saves $300 per month, break-even occurs at about 30 months. If you sell the home or refinance again before that point, refinancing may not pay off.

Rolling closing costs into the loan increases the loan balance and can extend break-even.

When Recast Tends to Make More Sense

  • Your current interest rate is competitive with market rates
  • You have a lump sum to apply to principal
  • You want to avoid high closing costs
  • You're satisfied with your current loan term
  • You have a conventional loan that allows recasting

When Refinance Tends to Make More Sense

  • Market rates are meaningfully lower than your current rate
  • You want to shorten or extend your loan term
  • You want to change loan types (ARM to fixed, etc.)
  • Long-term interest savings outweigh upfront costs
  • You plan to keep the loan beyond the break-even point

Can You Do Both?

You generally cannot recast and refinance the same loan at the same time. However, some homeowners recast first and refinance later if rates drop further.

Others refinance into a new loan and then recast that loan after making a lump-sum payment, if the lender allows it. Policies vary by lender.

Eligibility and Common Gotchas

Most conventional loans allow recasting, while FHA, VA, USDA, and some jumbo loans often do not. Minimum lump-sum requirements and fees vary by servicer.

Prepayment penalties are uncommon but should always be confirmed. Always verify eligibility and costs directly with your lender.

Assumptions / What's Included

The calculator uses standard amortization formulas for fixed-rate mortgages. Property taxes, insurance, and HOA fees are not included. Closing costs can be entered as a percentage or flat amount and optionally rolled into the loan. Results are estimates for educational purposes and should be verified with your lender.

Use the Calculator for Your Numbers

This calculator helps you estimate payments, savings, and break-even timing for both options. Results are estimates for educational purposes only and should be verified with your lender.

Frequently Asked Questions

What is the difference between recasting and refinancing?
Recasting recalculates your payment after a lump-sum principal payment while keeping the same loan. Refinancing replaces your loan with a new one that may have different rates and terms.
Does a recast save interest or just lower the payment?
A recast lowers the required payment. Interest savings come primarily from the principal reduction itself, not from a rate change.
How do I calculate refinance break-even?
Break-even is estimated by dividing closing costs by monthly savings. It represents how long it takes to recover upfront costs.
Are closing costs included in the calculator?
Yes. The calculator lets you enter closing costs and optionally roll them into the new loan to see how that affects payments and break-even.
Can I refinance and also make a lump-sum payment?
Yes. Some borrowers refinance and apply a lump sum either at closing or later, depending on lender rules.
Which loans typically allow recasting?
Most conventional loans allow recasting. FHA, VA, USDA, and some jumbo loans often do not.
How accurate is this calculator?
The calculator uses standard amortization formulas but provides estimates only. Actual loan terms and costs vary by lender.

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