Free Mortgage Amortization Calculator
Generate a complete month-by-month mortgage amortization schedule. See how each payment is split between principal and interest. Free loan amortization table with totals.
Monthly Payment
$1,896
Total Interest
$382,633
Total Cost
$682,633
Amortization Schedule (showing first 24 of 360 months)
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $1,896.20 | $271.20 | $1,625.00 | $299,728.80 |
| 2 | $1,896.20 | $272.67 | $1,623.53 | $299,456.12 |
| 3 | $1,896.20 | $274.15 | $1,622.05 | $299,181.97 |
| 4 | $1,896.20 | $275.64 | $1,620.57 | $298,906.34 |
| 5 | $1,896.20 | $277.13 | $1,619.08 | $298,629.21 |
| 6 | $1,896.20 | $278.63 | $1,617.57 | $298,350.58 |
| 7 | $1,896.20 | $280.14 | $1,616.07 | $298,070.44 |
| 8 | $1,896.20 | $281.66 | $1,614.55 | $297,788.79 |
| 9 | $1,896.20 | $283.18 | $1,613.02 | $297,505.60 |
| 10 | $1,896.20 | $284.72 | $1,611.49 | $297,220.89 |
| 11 | $1,896.20 | $286.26 | $1,609.95 | $296,934.63 |
| 12 | $1,896.20 | $287.81 | $1,608.40 | $296,646.82 |
| 13 | $1,896.20 | $289.37 | $1,606.84 | $296,357.46 |
| 14 | $1,896.20 | $290.93 | $1,605.27 | $296,066.52 |
| 15 | $1,896.20 | $292.51 | $1,603.69 | $295,774.01 |
| 16 | $1,896.20 | $294.09 | $1,602.11 | $295,479.92 |
| 17 | $1,896.20 | $295.69 | $1,600.52 | $295,184.23 |
| 18 | $1,896.20 | $297.29 | $1,598.91 | $294,886.94 |
| 19 | $1,896.20 | $298.90 | $1,597.30 | $294,588.04 |
| 20 | $1,896.20 | $300.52 | $1,595.69 | $294,287.52 |
| 21 | $1,896.20 | $302.15 | $1,594.06 | $293,985.37 |
| 22 | $1,896.20 | $303.78 | $1,592.42 | $293,681.59 |
| 23 | $1,896.20 | $305.43 | $1,590.78 | $293,376.16 |
| 24 | $1,896.20 | $307.08 | $1,589.12 | $293,069.08 |
| Total | $682,633 | $300,000 | $382,633 | $0 |
This calculator shows principal and interest only. Actual payments may include property taxes, insurance, and PMI. Consult a mortgage professional for exact figures.
Formula
Monthly Payment = P × [r(1+r)^n] / [(1+r)^n − 1], where P = principal, r = monthly rate, n = total monthsWhat Is Mortgage Amortization?
Amortization is the process of paying off a debt through regular, scheduled payments over a set period of time. Each payment is divided between interest charges and principal reduction. In a standard fully amortizing mortgage, the payment amount stays the same every month, but the split between interest and principal changes dramatically over the life of the loan.
At the beginning of a 30-year mortgage, roughly 70-80% of each payment may go toward interest, with only 20-30% reducing the actual loan balance. By the final years, this ratio flips almost completely — nearly the entire payment goes toward principal. Understanding this shift is essential for making informed decisions about extra payments, refinancing, and home equity.
How the Amortization Formula Works
The standard amortization formula calculates a fixed monthly payment that will exactly pay off the loan principal plus all accrued interest over the specified term. The formula accounts for compound interest — interest charged on the remaining balance each month. Given a principal amount P, monthly interest rate r, and total number of payments n, the monthly payment M equals P multiplied by [r(1+r)^n] divided by [(1+r)^n - 1].
This elegant formula ensures that every fully amortizing loan, regardless of size or interest rate, follows the same mathematical pattern: heavy interest at the start, gradually shifting toward principal. The only variables that change the speed of this shift are the interest rate and the loan term.
Reading Your Amortization Schedule
An amortization table has five key columns for each payment period: the payment number, principal portion, interest portion, total payment, and remaining balance. The total payment stays constant (for fixed-rate loans), but the principal and interest columns shift over time. The remaining balance column shows how much you still owe after each payment.
Pay attention to the crossover point — the month where principal exceeds interest in your payment. For a 30-year mortgage at typical rates, this crossover often doesn't happen until year 15 or later. This is why the first decade of payments can feel frustratingly slow in building equity.
Strategies for Paying Off Your Mortgage Faster
- Make biweekly payments — Paying half your monthly payment every two weeks results in 26 half-payments (13 full payments) per year instead of 12, effectively adding one extra payment annually
- Round up payments — Rounding your payment up to the next $100 can shave years off your loan with minimal monthly impact
- Apply windfalls to principal — Tax refunds, bonuses, and gifts can make a big dent when applied directly to principal
- Refinance to a shorter term — If rates drop or your income increases, refinancing from a 30-year to a 15-year mortgage dramatically reduces total interest
- Consider recasting — Some lenders allow you to make a large principal payment and then recast (recalculate) your monthly payment at a lower amount
Total Cost of a Mortgage
The true cost of a mortgage is far more than the purchase price. On a $300,000 loan at 6.5% over 30 years, you'll pay approximately $382,000 in interest alone — more than the original loan amount. The total cost of the loan exceeds $682,000. This is why even small differences in interest rates matter enormously: the difference between 6.0% and 6.5% on that same loan is roughly $36,000 over the life of the loan.
Our amortization calculator shows the complete picture: total interest paid, total cost, and exactly how each payment is allocated. Use it to compare different loan scenarios, evaluate refinancing options, or plan extra payment strategies that could save you tens of thousands of dollars.
Frequently Asked Questions
What is an amortization schedule?
An amortization schedule is a complete table showing every payment over the life of a loan, broken down into principal and interest components. Early in the loan, most of each payment goes toward interest. As the balance decreases over time, a larger portion goes toward principal. This schedule helps borrowers understand exactly how their loan is paid off month by month.
Why do I pay more interest at the beginning of the loan?
Interest is calculated on the remaining balance, so when the balance is highest (at the start), the interest charge is largest. As you make payments and the balance shrinks, less interest accrues each month, and more of your fixed payment goes toward reducing the principal. This is why the split between principal and interest shifts dramatically over a 30-year mortgage.
How do extra payments affect my amortization?
Extra payments go directly toward reducing the principal balance, which reduces the interest charged in all subsequent months. Even small extra payments can dramatically reduce total interest paid and shorten the loan term. For example, paying an extra $200/month on a $300,000 mortgage at 6.5% can save over $100,000 in interest and pay off the loan 7+ years early.
What is the difference between a 15-year and 30-year mortgage?
A 15-year mortgage has higher monthly payments but much lower total interest. A 30-year mortgage has lower monthly payments, making it more affordable month-to-month, but you pay significantly more interest over the life of the loan. For a $300,000 loan at 6.5%, the 30-year option costs roughly $380,000 more in total interest compared to the 15-year option.
Does this calculator include property taxes and insurance?
No, this calculator shows principal and interest only (P&I). Your actual monthly housing payment typically also includes property taxes, homeowner's insurance, and possibly private mortgage insurance (PMI) if your down payment was less than 20%. These additional costs are often collected through an escrow account and can add hundreds of dollars to your monthly payment.