Direct Answer
Paying off your mortgage early works by applying extra principal each month or as a lump sum, which reduces the balance faster and cuts future interest. On a $280,000 balance at 6.5% with 30 years remaining, adding $200/month saves about $74,000 in interest and pays the loan off roughly six years early.
Enter your balance, rate, term, and extra payment in the Mortgage Payoff Calculator to see your new payoff date and interest saved - then download the accelerated schedule.
New Payoff Timeline
240 months
(5.0 years saved vs. base schedule)
- Base Monthly P&I
- $1,891
- Interest Saved
- $66,894
- Months Saved
- 60
- Total Interest
- $220,280
Accelerated Payoff Schedule (Annual Summary)
| Year | Payments | Interest | Principal | Ending balance |
|---|---|---|---|---|
| 1 | $25,087 | $17,991 | $7,096 | $272,904 |
| 2 | $25,087 | $17,516 | $7,571 | $265,333 |
| 3 | $25,087 | $17,009 | $8,078 | $257,255 |
| 4 | $25,087 | $16,468 | $8,619 | $248,636 |
| 5 | $25,087 | $15,891 | $9,196 | $239,439 |
| 6 | $25,087 | $15,275 | $9,812 | $229,627 |
| 7 | $25,087 | $14,617 | $10,469 | $219,157 |
| 8 | $25,087 | $13,916 | $11,171 | $207,987 |
| 9 | $25,087 | $13,168 | $11,919 | $196,068 |
| 10 | $25,087 | $12,370 | $12,717 | $183,351 |
Last verified on: July 13, 2026
Editorial note: This guide covers fixed-rate amortized mortgages. It does not account for tax deductions, investment opportunity cost, adjustable-rate resets, or lender-specific prepayment rules. Compare strategies with your loan servicer before sending large lump sums.
Research method: Daily Calcs modeled three fixed-rate loans ($180k / $280k / $400k) using the standard fixed-payment amortization formula. Extra payments apply to principal after the scheduled payment. Verified against Consumer Financial Protection Bureau (CFPB) mortgage payoff guidance July 13, 2026.
Why Extra Principal Works
Mortgage interest is charged on your outstanding balance. When you add extra principal, every future month’s interest is calculated on a smaller number, so the saving compounds for the rest of the loan.
The earlier you add it, the larger the effect. An extra $200 in year one saves far more total interest than the same $200 in year 20 because more months remain for the reduced balance to matter.
Worked Example: $280,000 at 6.5%
Base principal-and-interest payment: about $1,770/month with 30 years remaining.
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| Extra per month | Total monthly outlay | Interest saved (est.) | Years cut (est.) |
|---|---|---|---|
| $0 | $1,770 | - | - |
| $100 | $1,870 | ~$45,000 | ~4 years |
| $200 | $1,970 | ~$74,000 | ~6 years |
| $400 | $2,170 | ~$118,000 | ~10 years |
Figures are illustrative. Model your exact loan in the Mortgage Payoff Calculator.
How to read the table
The $200/month row adds $24,000 in extra cash over six years ($200 × 72 months) but saves $74,000 in interest - a net benefit of about $50,000 because future interest is charged on a permanently smaller balance. That is why consistent small extras often beat occasional large ones when started early.
Three Loan Scenarios Side by Side
The same extra-payment habit looks different on a mid-balance refinance leftover, a typical primary note, and a large recent purchase. Compare these three distinct principals (not three extras on one loan):
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| Loan | Rate / remaining term | Scheduled P&I | Extra / month | Est. interest saved | Est. time cut |
|---|---|---|---|---|---|
| A - $180,000 remaining | 6.0% / 22 years | ~$1,158 | $150 | ~$33,000 | ~49 months |
| B - $280,000 remaining | 6.5% / 30 years | ~$1,770 | $200 | ~$74,000 | ~6 years |
| C - $400,000 remaining | 6.75% / 28 years | ~$2,595 | $500 | ~$180,000 | ~9.4 years |
Takeaway: Higher balance + higher rate + larger extra = more absolute interest avoided. Scenario A still pays for itself if cash flow only supports $150/month; Scenario C is where aggressive extras often beat low-risk investing on pure math.
Also model a lump sum twin on Loan B: a one-time $10,000 principal payment in month 1 typically saves more interest than spreading that same $10,000 evenly across later years - run both paths in the Mortgage Payoff Calculator.
Strategy 1: Extra Monthly Principal
Designate extra principal on your payment coupon or through your servicer’s portal. Even $50 to $100 per month compounds meaningfully over a 30-year term, and you keep full flexibility to stop if money gets tight.
Servicer checklist:
- Log in and find the “principal only” or “additional principal” field.
- Confirm the payment receipt shows principal curtailment, not “payment applied to next month.”
- Save confirmation emails until the next statement reflects the lower balance.
Strategy 2: One Extra Payment Per Year
Making 13 monthly payments a year - or a true biweekly schedule of 26 half-payments - adds one full payment annually and typically removes four to six years from a 30-year loan.
Replicate it without a biweekly service: divide your payment by 12 and add that amount to each monthly payment. On a $1,770 payment, that is $148/month extra - the same math as one extra payment per year.
See the Biweekly Payment Calculator to compare true biweekly vs monthly-with-extra.
Strategy 3: Lump Sums
Apply bonuses, tax refunds, or home-sale proceeds directly to principal. If you would rather lower the required payment than shorten the term, a mortgage recast re-amortizes the smaller balance at the same rate for a small fee.
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| Goal | Best tool |
|---|---|
| Pay off sooner, save most interest | Lump sum to principal (no recast) |
| Lower mandatory payment, keep rate | Recast after lump sum |
| Lower rate and payment | Refinance |
Pay Off Early vs Invest
Paying extra principal earns a guaranteed return equal to your mortgage rate (6.5% in the example above). Compare that against the expected after-tax return of diversified investments.
Priority order many planners use:
- Emergency fund (three to six months of expenses)
- Employer 401(k) match
- High-interest debt (credit cards, personal loans)
- Extra mortgage principal or taxable investing - depends on risk tolerance and rate
There are usually no prepayment penalties on modern conforming, Federal Housing Administration (FHA), or U.S. Department of Veterans Affairs (VA) loans, but check your note to confirm.
What This Means for Your Monthly Payment
Extra principal does not lower your scheduled payment unless you recast or refinance. Your contractual payment stays the same; you simply finish sooner.
On the $280,000 example with $200/month extra:
- Scheduled payment: still $1,770
- You voluntarily pay $1,970 until payoff
- Loan ends in about 24 years instead of 30
If cash flow is tight, smaller consistent extras ($50-$100) still move the payoff date without straining the budget.
Pre-Payoff Checklist
Calculator Methodology
The payoff model uses standard fixed-rate amortization:
Payment = P × r(1 + r)^n / ((1 + r)^n - 1)Each month: interest = balance × monthly rate; principal = payment − interest; extra principal reduces balance before the next month.
Assumptions: Fixed rate, level payment, extras applied to principal immediately, no prepayment penalty.
Limitations: Does not include escrow (taxes, insurance), adjustable-rate changes, tax effects, or investment opportunity cost. Not a binding quote from your servicer.
Related Reading
- Mortgage Recast vs Refinance - lower the payment instead
- Refinance vs Extra Payments - which saves more
- Extra Mortgage Payment Savings Report - $250k loan scenario data
- The 15-Year Mortgage Hack - a structural alternative
Official and Supporting Sources
Next Step
Enter your balance, rate, and extra-payment amount in the Mortgage Payoff Calculator to see your exact payoff date and interest saved.
Frequently Asked Questions
How much can I save with extra mortgage payments?
Savings depend on balance, rate, term, and extra amount. Three planning anchors: (1) $280,000 at 6.5% with 30 years left + $200/month ≈ $74,000 interest saved and ~6 years cut. (2) $180,000 at 6% with 22 years left + $150/month ≈ $33,000 saved and ~49 months early. (3) $400,000 at 6.75% with 28 years left + $500/month ≈ $180,000 saved and ~9 years early. Use the Mortgage Payoff Calculator with your exact numbers - early-year extras save more than the same dollars in year 20.
Should extra payments go to principal?
Yes. Specify principal curtailment so funds reduce balance rather than prepaying future escrow or interest-only buckets. Many servicers let you mark extra amounts online or on your payment coupon. Confirm in writing that overpayments credit to principal and do not simply advance your next due date - advancing the due date saves no interest.
Is biweekly the same as extra payments?
True biweekly schedules make 26 half-payments per year - one extra full payment annually. You can replicate this by dividing your monthly payment by 12 and adding that amount to each monthly payment. Biweekly works only if your servicer actually debits every two weeks; some third-party biweekly services charge fees for the same math you can run yourself.
Are there prepayment penalties?
Most modern agency loans have no prepayment penalties. Check your note. Federal Housing Administration (FHA), U.S. Department of Veterans Affairs (VA), and conventional conforming loans typically allow unlimited extra principal. Some portfolio or non-qualified mortgage products may restrict prepayment - verify before you send a large lump sum.
Recast or extra payments - which first?
Extra payments shorten the loan and cut total interest. A recast lowers the required monthly payment after a large lump sum while keeping the same rate and payoff date. Some homeowners recast for cash-flow relief, then continue paying the old higher amount to accelerate payoff. Choose recast when you need a lower mandatory payment; choose extra principal when your goal is earliest payoff and lowest lifetime interest.
Extra payments vs refinancing: Which saves more?
Refinancing wins when market rates are meaningfully below your current rate and closing costs break even before you sell. Extra payments win when your rate is already competitive, you want flexibility without closing costs, or you prefer guaranteed savings equal to your mortgage rate. Many borrowers refinance once for a lower rate, then add extra principal on the new loan for maximum effect.
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