Mortgage Payment Calculator
Estimate payment & charts
Results
| Principal & interest (P&I) | — |
|---|---|
| Property tax (mo.) | — |
| Home insurance (mo.) | — |
| Estimated total / month | — |
Charts
Enter values and press Calculate to see the monthly breakdown donut and loan balance line.
| Month | Balance | Tax / mo | Ins. / mo |
|---|
How to Use This Mortgage Payment Calculator
Numbers in a table are useful, but seeing how P&I, tax, and insurance stack—and how your loan balance falls over 30 years—makes the payment feel real. This page runs the same math as our classic Mortgage Calculator, then adds a monthly donut chart, a balance line, and a shareable link you can send to a co-borrower.
- Enter home price and down payment. Choose dollar or percent mode for the down payment field.
- Set loan term and interest rate. These drive P&I and the balance curve shape.
- Optionally enter annual property tax and insurance. Each splits into a monthly escrow-style line on the donut chart.
- Press Calculate. Review the breakdown table, donut, balance line, and screen-reader amortization sample.
- Use Share Calculation to copy a URL with your inputs encoded.
Mortgage Payment Formulas and Practical Applications
P&I uses the standard fully amortizing fixed-rate formula. Optional annual property tax and homeowners insurance convert to monthly amounts with annual ÷ 12 so the donut matches the table row for row. The balance line tracks only loan principal—tax and insurance do not shrink what you owe the lender, which is why they sit outside the payoff curve.
Monthly P&I
M = P × [ i(1 + i)ⁿ ] / [ (1 + i)ⁿ − 1 ]
On a $320,000 loan at 6% for 30 years, P&I is about $1,918.56. The balance line starts at $320,000 and reaches zero at month 360.
Reading the charts
The donut combines P&I, tax, and insurance slices with color, hatching, dash patterns, and text labels so the breakdown is not conveyed by color alone. Early in the loan, interest dominates each P&I payment even though the monthly total stays flat—that is why the balance curve drops slowly at first, then steepens as more principal is applied each month.
What is not modeled
PMI/MIP, HOA dues, lender fees, and irregular escrow true-ups are not included. If your loan requires mortgage insurance, your actual monthly housing cost can exceed the total shown here.
Frequently Asked Questions
How is this Mortgage Payment Calculator different from the other Mortgage Calculator?
Both use the same principal-and-interest formula and optional monthly tax and insurance splits from annual amounts. This page adds SVG visuals—a donut of the estimated monthly parts and a line of remaining loan principal after each payment—plus a small sample amortization table for screen readers. The classic Mortgage Calculator focuses on a compact numeric breakdown table only.
How should I read the balance line chart?
The line tracks only the loan balance for principal and interest (start equals the amount borrowed after your down payment, end reaches zero when the loan is fully amortized). Optional property tax and insurance are shown in the monthly donut but are not part of the payoff curve because they do not reduce principal.
How is the monthly donut split calculated?
Each slice uses the same monthly amounts as the results table: principal and interest together as one slice, property tax monthly (annual tax divided by twelve), and homeowners insurance monthly (annual premium divided by twelve). Labels P&I, Tax, and Ins. sit beside the graphic.
Does this calculator include PMI, MIP, or HOA fees?
No. Mortgage insurance and HOA dues are not modeled. If your loan requires PMI or MIP, or you pay association dues, your actual monthly housing cost can be higher than the total shown here.
Can I share my calculation with someone else?
Yes. Press Share Calculation to copy a URL with your inputs encoded. Anyone opening that link sees the same values pre-filled.