Mortgage Payoff Calculator
See how extra payments cut years off your mortgage & save thousands in interest · Updated June 2026
Enter your loan balance, rate, and term.
Add extra payments to see how fast you can
pay off your mortgage early.
What Is a Mortgage Payoff Calculator?
A mortgage payoff calculator shows you exactly when your mortgage will be paid off and how much interest you'll pay over the life of the loan — with or without extra payments. It also lets you model different early payoff strategies: adding a fixed amount monthly, making an annual lump sum, or applying a one-time payment to your principal.
The core purpose is to show you the power of extra principal payments. Because mortgage interest is calculated on your outstanding balance, every extra dollar you pay toward principal reduces the balance on which future interest accrues — compounding your savings over time. Even modest extra payments made early in a loan's life can save tens of thousands of dollars.
How to Use This Calculator
Current Loan Balance
Enter your remaining mortgage balance — not your original loan amount. Check your most recent mortgage statement or log into your lender's portal to find your current payoff balance. Note that the payoff balance on a statement may differ slightly from your current balance due to accrued interest to the payoff date.
Annual Interest Rate
Enter your mortgage's annual interest rate (not APR). For a fixed-rate mortgage, this stays the same for the life of the loan. For an adjustable-rate mortgage (ARM), use your current rate — the calculation will only be accurate through your next adjustment period. As of June 2026, average rates are 6.57% (30-year fixed) and 5.91% (15-year fixed) per Freddie Mac's weekly survey.
Remaining Term
Select how many years remain on your mortgage, or use "Custom months" to enter the exact number of remaining months. If you took out a 30-year loan 6 years ago, your remaining term is 24 years (288 months).
Extra Payments
- Extra monthly payment — a fixed additional amount added to every monthly payment. This is the most consistent and highest-impact method over time.
- Extra annual lump sum — a once-a-year payment, such as a tax refund, bonus, or year-end contribution. Applied every 12 months in the calculation.
- One-time payment — a single immediate extra payment applied to your balance right now. Useful for modeling an inheritance, home sale proceeds, or windfall.
How Mortgage Payoff Is Calculated
Every mortgage payment is split between interest and principal. Interest is calculated on your remaining balance each month, so early payments are heavily weighted toward interest. As the balance decreases, more of each payment goes toward principal — this is standard amortization.
The standard monthly payment formula (principal + interest) is:
M = P × [r(1+r)ⁿ] / [(1+r)ⁿ – 1]
- M = monthly payment
- P = remaining loan principal
- r = monthly interest rate (annual rate ÷ 12)
- n = number of remaining monthly payments
When you make extra payments, the additional amount reduces your principal directly. The next month's interest is then calculated on this lower balance — so you save more on interest in every subsequent payment. The savings compound over time, which is why early extra payments have significantly more impact than late ones.
Real Example: $350,000 Mortgage at 6.57% over 30 Years
| Extra Payment | Monthly Payment | Payoff In | Total Interest | Interest Saved |
|---|---|---|---|---|
| No extras | $2,229 | 30 years | $452,556 | — |
| +$100/month | $2,329 | ~26.5 yrs | $393,211 | ~$59,345 |
| +$200/month | $2,429 | ~24 yrs | $341,847 | ~$110,709 |
| +$300/month | $2,529 | ~22 yrs | $298,103 | ~$154,453 |
| +$500/month | $2,729 | ~19 yrs | $230,871 | ~$221,685 |
* Illustrative figures based on $350,000 balance, 6.57% rate, 30-year term. P&I only; does not include taxes, insurance, or PMI.
Strategies to Pay Off Your Mortgage Early
1. Extra Monthly Payments
Adding a fixed amount to every monthly payment is the most effective long-term strategy because it reduces principal consistently and compounds savings over time. Even $100/month extra on a $350,000 loan at 6.57% saves over $59,000 in interest and cuts 3.5 years off the loan.
2. Biweekly Payments
Instead of one full payment each month, pay half your monthly payment every two weeks. With 52 weeks in a year, this results in 26 half-payments — equivalent to 13 full monthly payments per year instead of 12. That one extra payment per year goes entirely toward principal. On a $350,000 30-year mortgage at 6.57%, switching to biweekly payments can save approximately $50,000–$60,000 in interest and pay off the mortgage 4–5 years early.
Important: Confirm with your lender that they apply biweekly payments correctly. Some lenders hold the first half-payment until the second arrives and process them as a single monthly payment — which provides no benefit. True biweekly mortgage programs apply each half-payment on receipt.
3. Annual Lump Sum Payments
Applying a once-a-year lump sum — such as a tax refund, work bonus, or annual savings — directly reduces principal. Applying $5,000 annually to a $350,000 30-year mortgage at 6.57% can cut approximately 8–9 years off the loan and save over $140,000 in interest.
4. One-Time Windfall Payment
An inheritance, insurance settlement, asset sale, or other one-time windfall applied immediately to your mortgage principal creates an immediate, permanent reduction in the balance on which future interest accrues. The earlier in the loan term this happens, the greater the compounding benefit.
5. Refinancing to a Shorter Term
Refinancing from a 30-year to a 15-year mortgage increases monthly payments but dramatically reduces total interest. The 15-year rate is typically lower than the 30-year rate — as of June 2026, the 15-year average is 5.91% vs 6.57% for 30 years. On a $350,000 refinance, switching to a 15-year at 5.91% would raise the monthly payment by approximately $600–$700 but save over $250,000 in total interest compared to completing the original 30-year term.
6. Rounding Up Payments
A simpler approach: round up your monthly payment to the nearest $50 or $100. If your payment is $2,229, pay $2,300. That $71 extra each month adds up to $852/year in extra principal payments and can trim 1–2 years off a 30-year mortgage with minimal budget impact.
Prepayment Penalties — What You Need to Know 2026
Before making large extra payments, check whether your mortgage has a prepayment penalty clause. Under current federal regulations (12 C.F.R. § 1026.43(g), 2026), prepayment penalties on qualified mortgages are strictly limited:
- Prepayment penalties are only allowed within the first 3 years after loan consummation. After 3 years, no penalty can be charged.
- Year 1 and Year 2: The penalty cannot exceed 2% of the outstanding loan balance.
- Year 3: The penalty is capped at 1% of the outstanding loan balance.
- Prepayment penalties are prohibited entirely on FHA loans, VA loans, and USDA loans.
- Higher-priced mortgage loans have additional restrictions on prepayment penalties.
Most conventional mortgages originated in the last decade do not include prepayment penalties — but always verify with your lender before making large lump sum payments.
Mortgage Interest Tax Deduction — 2026 Rules OBBBA Update
Paying off your mortgage early means you'll pay less interest overall — which also means a smaller mortgage interest tax deduction. Before accelerating payoff, understand how the deduction works in 2026:
The $750,000 Limit Is Now Permanent
The Tax Cuts and Jobs Act (TCJA) of 2017 reduced the deductible mortgage interest limit from $1 million to $750,000 for loans originated after December 15, 2017. This limit was originally set to expire December 31, 2025 — which would have restored the $1 million cap. However, the OBBBA (signed July 4, 2025) made the $750,000 limit permanent. It will not revert unless Congress passes new legislation.
Key 2026 Mortgage Interest Deduction Rules
- Loans originated after December 15, 2017: Deductible interest limited to the first $750,000 of mortgage debt ($375,000 married filing separately). This limit is now permanent under OBBBA.
- Loans originated before December 16, 2017: Deductible interest limited to the first $1,000,000 ($500,000 married filing separately) — the pre-TCJA limit still applies to these older loans.
- Grandfathered debt (before October 13, 1987): No deduction limits on interest for primary and secondary residences.
- The $750,000 limit applies to the combined total of all qualifying mortgages — primary residence plus any second home, not each property separately.
- You must itemize deductions on Schedule A to claim mortgage interest. The 2026 standard deduction is $15,000 (single) / $30,000 (married filing jointly).
- Only about 14% of taxpayers now itemize (down from 30% pre-TCJA) due to the higher standard deduction.
2026 Mortgage Rate Context Updated June 14, 2026
Understanding current rate levels helps you make better decisions about payoff vs. refinancing vs. investing.
| Loan Type | Rate (June 14, 2026) | Source |
|---|---|---|
| 30-year fixed | 6.57% | Bankrate national survey |
| 30-year fixed (Freddie Mac) | 6.52% | Freddie Mac PMMS, June 11, 2026 |
| 15-year fixed | 5.91% | Bankrate national survey |
| 15-year fixed (Freddie Mac) | 5.84% | Freddie Mac PMMS, June 11, 2026 |
| 5/1 ARM | 5.81% | Bankrate national survey |
| 30-year jumbo | 6.60% | Bankrate national survey |
| 30-year refinance | 6.69% | Bankrate national survey |
2026 Conforming Loan Limits (FHFA)
| Property Type | Baseline (most counties) | High-cost ceiling |
|---|---|---|
| 1-unit (single family) | $832,750 | $1,249,125 |
| 2-unit | $1,066,200 | $1,599,300 |
| 3-unit | $1,288,600 | $1,932,900 |
| 4-unit | $1,600,850 | $2,401,275 |
* Source: FHFA, effective January 1, 2026. Alaska, Hawaii, Guam, and U.S. Virgin Islands have higher limits ($1,249,125 baseline). Loans above the conforming limit are classified as jumbo loans and typically carry higher rates and stricter underwriting.
Should You Pay Off Your Mortgage Early?
Early payoff is not always the optimal financial decision. Consider these factors:
When Early Payoff Makes Strong Sense
- You carry no higher-interest debt. At 6.57%, your mortgage costs less than credit cards (typically 20–28%), personal loans, or auto loans. Always pay down higher-rate debt first.
- You have a fully funded emergency fund. 3–6 months of expenses in liquid savings before accelerating mortgage payoff.
- You're near or in retirement. Eliminating a mortgage payment can dramatically reduce monthly expenses and reduce sequence-of-returns risk.
- You value psychological freedom from debt and the certainty of a guaranteed "return" equal to your mortgage rate.
- You don't itemize deductions and receive no tax benefit from mortgage interest.
When to Reconsider
- Your mortgage rate is below expected investment returns. If you expect a diversified index fund to return 7–10% long-term and your mortgage rate is 3–4%, keeping the mortgage and investing the difference may generate more wealth — though with more risk and no guarantee.
- You have significant employer 401(k) match not fully captured. Capturing a full employer match is typically a higher-priority use of funds than extra mortgage payments.
- You have other high-priority goals such as college funding, business investment, or near-term large purchases.