What is the lump-sum payoff strategy?
The lump-sum strategy applies windfall cash directly to mortgage principal, immediately reducing the balance interest is calculated on for every future month. Unlike monthly extra payments, lump sums require no behavior change — just a single decision to redirect found money toward your mortgage.
Step-by-step: How do I make a lump-sum payment?
- Confirm no prepayment penalty. Most modern conventional loans do not have one.
- Make sure you have a 6-month emergency fund first. Once paid, the cash is locked in equity.
- Log into your servicer\'s online portal and find "Make a Payment."
- Choose "Principal Only" as the payment type.
- Enter the lump-sum amount and submit. Verify on your next statement.
- Optional: ask about recasting. If you want a lower monthly payment, request a recast after the lump sum is applied (typical fee: $250-$500).
Where do most homeowners find lump-sum cash?
- Annual tax refund: $1,500-$5,000 typical
- Year-end bonus: $2,000-$15,000+
- Inheritance: highly variable
- Sale of a vehicle, RV, or boat
- Stock vesting events
- Side business profits
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How big is the impact of a single lump sum?
On a $320,000, 30-year, 6.5% loan applied in year 5:
- $5,000 lump sum: ~$13K interest saved · ~7 months earlier
- $10,000 lump sum: ~$25K saved · ~14 months earlier
- $25,000 lump sum: ~$60K saved · ~32 months earlier
Use our Lump Sum Calculator for your specific numbers.