This mortgage amortization calculator estimates the fixed monthly principal and interest payment on a home loan. Enter principal, annual rate, and term in years. The result is the amortizing payment that would pay the loan off over that term if the rate stays fixed.
For the primary mortgage payment workflow on Multicalify, also see the live mortgage calculator. Use this page when you specifically want amortization focused framing of the same PMT idea.
How amortization payment works
Months equal years times 12. Monthly rate equals annual rate divided by 100 then by 12. Payment follows the standard amortizing PMT formula. Early payments are interest heavy. Later payments are principal heavy, but the payment amount stays level on a fixed rate loan.
Worked example
Principal $350,000, rate 6.5 percent, 30 years. Monthly payment is about $2,212.24.
| Input | Value |
|---|---|
| Principal | $350,000 |
| Rate | 6.5% |
| Years | 30 |
| Monthly payment | ~$2,212.24 |
How to use the calculator
- Enter the loan amount after down payment.
- Enter the note rate as an annual percent.
- Enter amortization years such as 15, 20, or 30.
- Budget taxes, insurance, and HOA outside this P and I figure.
Amortization versus payoff tools
This page answers what payment amortizes the loan on schedule. If you plan extra principal, switch to the mortgage payoff calculator to estimate fewer months. If you need Canadian semi-annual compounding, use the Canadian mortgage calculator instead.
Term length tradeoffs
Shorter terms raise the payment and cut total interest. Longer terms ease the payment and raise total interest. Compare both before you lock a structure you cannot comfortably fund.
Common mistakes
- Comparing P and I to a full PITI escrow quote
- Entering purchase price instead of loan principal
- Ignoring PMI when down payment is low
- Using U.S. monthly/12 math on a Canadian semi-annual quote
What a level payment is doing each month
Interest is charged on the current balance. The fixed payment covers that interest and uses the rest to cut principal. Because principal falls, the next month interest is slightly smaller, so more of the same payment can go to principal. That feedback loop is amortization.
You do not need a 360 row table to understand the idea. The payment result is enough to budget. Extra principal tools answer a different question: how fast you can leave the schedule early.
PITI versus this calculator
Lenders qualify borrowers on more than P and I. Property tax, home insurance, and mortgage insurance can sit in escrow. HOA dues may be counted too. When a loan officer quotes a higher monthly figure than this calculator, escrow and insurance are the usual reason.
Budget with the full housing payment even while you use this page to understand the loan portion.
- Start from loan principal, not purchase price.
- Compare 15 and 30 year payments before you fall in love with a list price.
- Use the mortgage calculator when you want the main Multicalify mortgage entry page.
- Use payoff tools when extras are part of the plan.
Fixed rate amortization is predictable. ARMs and interest only products are not the same story. If your loan is not a plain fixed amortizing mortgage, treat this estimate as a reference point only and ask for a lender schedule that matches the product.
Extra principal and schedule identity
Making extras does not change the fact that the original payment was built from an amortizing formula. It changes how fast you leave that schedule. Keep the amortization calculator for payment sizing, then switch to payoff tools when you want months saved.
If you refinance into a new amortization, restart the mental clock. The old schedule no longer governs the new note.
Practical review steps
Before you rely on the result, recheck each input against a source document such as a statement, quote, or measurement note. Run one optimistic case and one cautious case so you see how sensitive the answer is. Save the inputs beside the output so you can explain the estimate later without guessing what you typed.
If a related Multicalify tool answers a neighboring question better, open that tool rather than forcing this page to do the wrong job. Clear tool boundaries keep results easier to trust and easier to explain to someone else who was not present when you calculated.
Limitations
Points, credits, and lender fees are outside the payment. Confirm final figures on the Closing Disclosure or local equivalent.