Free mortgage payoff calculator

Pay off your mortgage years faster — and save tens of thousands in interest.

One home or a whole rental portfolio. Enter your numbers, add an extra payment, and see exactly how much interest and time you save.

See how it works →
No sign-up. No uploads. Your numbers stay on your device.
Portfolio Payoff Snapshot
Sample Scenario
4
$1,000
Highest Rate
Save $84,320
and pay off 6.2 years sooner
Best outcome: Highest-interest-first strategy
Current Plan
Payoff 24.5 years
Interest $387,200
Monthly $6,840
Optimized Plan
Payoff 18.3 years
Interest $302,880
Monthly $7,840
Private by design. Data never leaves your browser.
Bank-standard amortization math.
Export anytime to PDF, Excel, or CSV.

What would you like to figure out?

Pick one. Both are free and run entirely in your browser — no sign-up, no uploads.

How it works

1
Add Properties
Enter balance, rate, and payment for each mortgage.
2
Set Extra Payment
Choose how much extra you can pay each month.
3
Run Analysis
Compare all 7 payoff strategies automatically.
4
Save Money
See which strategy saves you the most interest and time.
Free planner

Should you pay off your mortgages early?

Four simple questions. We'll tell you exactly which mortgages to pay down, which to leave alone, and how to split your money.

1
Add your mortgages
Put each mortgage in the table below. Tick the Use box next to any mortgage you want in the analysis — leave the rest unchecked.
💡 Tips for a fast, accurate entry
  • Everything you need is on your mortgage statement: current balance and monthly P&I payment (principal & interest only — not the total PITI that includes escrow/tax/insurance).
  • Don't know the interest rate? Enter balance + P&I, then click the 🔢 button next to the Rate field. It back-solves the rate for you from your statement data.
  • Partway through a loan? When it asks for "years remaining," subtract years already paid (e.g., enter 18 for a 30-year loan you're 12 years into). Brand-new 30-year? Use 30.
  • Use box on the left lets you temporarily include or exclude any mortgage from the analysis without deleting it.
Use Name Balance Rate % Monthly P&I
2
Pick your investments
Click each card to check it. Only checked investments are used. You can change the Expected return on any card, or Add your own below.
3
How much extra per month?
On top of your required minimum payments — how much extra money can you put toward this every month?
$ per month
4
How aggressive do you want to be?
Pick a style. You can change it and run the plan again.
%

🏠 Prepay usually wins when…

  • Your mortgage rate (or the weighted average across several) is around 5–6% or higher — that's a guaranteed, risk-free return few low-to-moderate-risk investments can reliably beat.
  • You prefer certainty over market risk.
  • You're close to retirement and want the monthly payment gone.
  • You'd probably spend the "extra" if you didn't put it into the house.

📊 Investing usually wins when…

  • Your mortgage rate (or weighted average) is around 4% or below — leaving plenty of headroom for broad-market returns to outperform.
  • You have 15+ years before you'd need the money.
  • You can stay invested through downturns without panic-selling.
  • You already have an emergency fund and are max’ing any 401(k) match.
A few honest caveats. The returns shown on the investment cards are rough long-term averages, not guarantees. Prepaying a mortgage is a certain, risk-free return equal to your rate; every other option here carries risk. Gold can go sideways for a decade. Small-cap and dividend stocks have outperformed on average but with bigger drawdowns. Bitcoin and crypto are speculative: past returns don't predict future ones. The model ignores taxes, fees, and inflation. This tool is educational and is not financial, tax, or legal advice — talk to a qualified advisor before any big decision.

Frequently Asked Questions

Why is this free?
Because the math doesn't need to cost anything. We built the tool we wanted for our own properties, and there's no sign-up, no premium tier, and no ads. Your numbers never leave your browser, so there's nothing to monetize even if we wanted to.
How is this different from a regular mortgage calculator?
Most calculators handle a single loan and a single extra payment. PayoffRentals lets you model a whole portfolio, compares seven payoff strategies side-by-side, and shows how freed-up payments cascade from one mortgage to the next as each gets paid off.
What is the "Set Payment To" column?
It shows the exact monthly payment to set for each property based on the winning strategy. As properties get paid off, the extra money rolls to the next target, so these amounts update over time.
Is my data private?
Yes. Everything is stored locally in your browser — no accounts, no uploads, no servers. Clear your browser data and it's gone. Use Export Backup to save an encrypted-friendly JSON file you can re-import on another device.
Which payoff strategy is best?
It depends on your goals. Highest-interest-first saves the most money. Smallest-balance-first frees up cash flow sooner. The tool compares them with your actual numbers so you can see the difference.
Can I use this for just one property?
Yes. When you open the calculator, choose "Single Property" mode for a quick analysis of one mortgage. You can always switch to multi-property mode later.
What is the avalanche method?
The avalanche method directs all extra payments to the mortgage with the highest interest rate first. Once that one is paid off, the freed-up payment rolls to the next highest rate. It saves the most money overall.
What is the snowball method?
The snowball method pays off the smallest balance first for quick wins. As each mortgage is eliminated, its payment rolls into the next one, building momentum like a snowball.
Can I import my properties from a spreadsheet?
Yes. Click "Import Excel/CSV" on the Properties tab. The importer auto-detects column headers and handles most spreadsheet formats. You can also download a template to fill in.
Does this work on my phone?
Yes, the calculator is fully responsive and works on phones, tablets, and desktops. Your data is saved in your browser, so you can pick up where you left off.
How accurate are the results?
Very. We use the same amortization formulas your lender uses. Accuracy depends on the numbers you enter — grab the current balance and rate from your latest statement. Results are estimates for planning; your lender's exact payoff quote may vary slightly due to daily interest accrual. Always confirm with a tax or financial professional before making large prepayments.
Can I save or export my results?
Yes. The Export PDF tab generates a detailed report. You can also export your data as a backup file to import on another device, and the Schedule tab creates a printable payment schedule.
How do I use this tool?
Three steps: (1) Add your properties by clicking "Add Property" or importing from a spreadsheet. Each property needs a name, current balance, interest rate, and monthly payment. (2) Go to the Strategy tab and enter how much extra you can pay each month above your minimums. (3) Click "Run Analysis" to compare all 7 payoff strategies and see which saves you the most money and time.
What are the 7 payoff strategies?
Avalanche: Targets the highest interest rate first, saving the most money overall. Snowball: Pays off the smallest balance first for quick motivational wins. Highest Payment: Targets the biggest monthly payment first, freeing up cash flow fastest. Shortest Term: Focuses on the mortgage closest to payoff for quick portfolio reduction. Highest Cash Flow: Prioritizes the best-earning rental so you can reinvest income sooner. Even Spread: Splits extra payments evenly across all mortgages. Custom Priority: You choose the payoff order yourself.
Any tips for importing a spreadsheet?
The importer works with most Excel and CSV formats. It auto-detects column headers and handles various layouts. Your file should have columns for Property Name, Current Balance, Interest Rate, and Monthly Payment. Optional columns include Property Value, Loan Term, Rental Income, and Expenses. It automatically skips paid-off properties, HOA rows, and non-mortgage items. You can download a template from the Export & Data tab to get started.

Mortgage Payoff Calculator

Add your properties, choose strategies, and run the analysis.

0 properties
🏠

No properties added yet. Add your properties one at a time, or import from a spreadsheet.

Want to see how it works first?

Loads a demo portfolio with 8 rentals so you can explore all the features.

Extra Monthly Payment

How much extra can you put toward your mortgages each month above and beyond all your minimum required payments? This is the additional money that will be strategically directed to pay down your properties faster.

This is on top of the minimum payments you already make on each property.
This is the total money left over each month after collecting rent, paying mortgages, and covering expenses on all your properties. If you entered income and expenses on the Properties tab, this number is calculated automatically.

Tip: Not sure what to enter? Click the button below to use your portfolio net cash flow as your extra payment amount.

🎯 Goal Calculator

Want everything paid off by a certain year? Enter your target and I will tell you how much extra per month you need.

Select Strategies to Compare

Choose one or more strategies. The results tab will compare them side by side.

📊

Run an analysis from the Strategy tab to see results here.

Refinance Scenario Planner

Compare your current mortgage terms against a potential refinance.

Export Portfolio Report

Generate a polished PDF report to share with partners, accountants, or for your records.

Select sections to include:

Report opens in a new window for printing or saving as PDF.

Save & Load Your Data

Your data is automatically saved in this browser. You can also export to a file for backup or to use on another device.

Import from Excel or CSV

Import properties from a spreadsheet. Your file should have columns for the property details. The importer is flexible and will try to match common column names automatically.

Required columns: Property Name, Current Balance, Interest Rate, Monthly Payment
Optional columns: Property Value, Original Loan, Loan Term, Start Date, Rental Income, Expenses, Escrow

Clear All Data

This will remove all properties and settings. This cannot be undone.

💾

Your data is automatically saved in this browser. It will be here next time you visit, no account needed. Just don't clear your browsing data.

💬

Help Us Improve PayoffRentals.com

Got an idea for a new feature, found a bug, or have feedback? We'd love to hear from you!