Payoff Atlas

RE-AMORTIZATION

Mortgage recast after a large principal payment

A voluntary mortgage recast, also called re-amortization, can recalculate principal and interest using a lower balance, the existing rate and the remaining term. It is not automatic and not every loan or servicer offers it.

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SHORT ANSWER

What to know first

Ask about eligibility, the required principal curtailment, fees, timing and documents before paying. A recast generally targets the required payment; an unrecast extra payment more directly targets an earlier payoff if the payment is maintained.

What changes and what usually does not

For eligible loans, the servicer applies a substantial principal payment and recalculates the principal-and-interest amount over the remaining term. Fannie Mae’s servicing guidance describes using the current unpaid principal balance, current interest rate and remaining loan term for qualifying loans. Taxes, insurance, association costs and mortgage insurance are separate.

A recast normally does not replace the mortgage, reset the maturity date or produce a new market interest rate. That distinguishes it from refinancing, which pays off the old loan and creates a new one with underwriting and closing costs.

Example: payment relief versus faster payoff

A homeowner makes a qualifying lump-sum curtailment. Without a recast, the contractual principal-and-interest payment may stay the same, causing more of each later payment to reduce principal and potentially shortening payoff. With a recast, the required payment may fall because the lower balance is spread across the original remaining term.

The homeowner can ask whether voluntary amounts above the new requirement are still allowed. Keeping the old total payment after a recast could preserve flexibility while accelerating payoff, but only the servicer can confirm the new obligation and posting process.

Questions before committing the lump sum

  1. Is this loan type and investor eligible for voluntary re-amortization?
  2. What minimum principal curtailment and account status are required?
  3. What fee, form and processing period apply?
  4. When will the new payment begin and how will autopay change?
  5. Will the rate and maturity date remain unchanged?
  6. Can later extra principal be made without another recast or penalty?

Risks the lower payment can hide

A lower required payment is useful for cash flow but is not proof of a larger interest saving than simply paying principal and maintaining the payment. Compare the same lump sum under both payment behaviours. Preserve cash for emergencies because the principal curtailment is usually difficult to reverse.

  • Do not confuse a payment recast with an ARM rate reset.
  • Check whether PMI treatment requires a separate request or valuation.
  • Confirm that the loan is current before relying on eligibility.
  • Include the recast fee in the comparison.
  • Obtain the revised payment and effective date in writing.

Use a calculator as a scenario, not a promise

Model the lump sum first, then distinguish the payment behaviour after it. The calculator does not execute a servicer recast; leaving the regular payment unchanged estimates faster payoff, while a lower post-recast payment needs a separate lender-confirmed scenario.

The U.S. model uses standard principal-and-interest amortization. Monthly payments use the entered contract rate; the true-biweekly option assumes half the monthly principal-and-interest amount is credited every fourteen days. Every entered extra is assumed to reach principal.

Taxes, homeowners insurance, escrow, PMI, HOA charges, servicing suspense accounts and future ARM changes are outside the schedule. Reconcile the baseline with a statement and rerun whenever rate, payment, balance or posting changes.

Review the plan before money leaves

Before acting, compare the proposed extra payment with a zero-extra case and a smaller or interrupted plan. Use the same starting balance, rate and dates in every case. A result is meaningful only when the payment remains affordable and the servicer accepts the assumed instruction.

Keep the Note, addenda, most recent statement and any written servicer answer with the calculation. If the loan is delinquent, in forbearance, under modification review or disputed, stop using a standard voluntary-prepayment scenario and obtain account-specific help.

  • Keep the full required payment and essential bills funded first.
  • Preserve accessible cash for repairs, taxes, insurance and income interruption.
  • Verify the first extra amount on the next periodic statement.
  • Rerun the estimate after a rate, payment, fee or servicing change.
  • Use a dated servicer payoff statement for the actual final payment.

U.S. sources checked

These government, regulator or government-backed sources were reviewed on 20 September 2026. Loan terms, rates and guidance can change; check the current source and your own contract.

Educational information, not personal advice

This guide provides general educational information for U.S. mortgage planning. It is not personalised financial, mortgage, investment, tax or legal advice and does not recommend a lender or product. Interest savings and a payoff date are not guaranteed. Check your loan agreement and current lender figures; seek appropriately authorised help for decisions that depend on your circumstances.

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