See exactly how each payment splits between principal and interest — year by year, with a downloadable schedule.
Monthly payment
$2,247
Principal and interest.
| Year | Paid | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $26,963 | $3,802 | $23,161 | $346,198 |
| 2 | $26,963 | $4,063 | $22,900 | $342,135 |
| 3 | $26,963 | $4,341 | $22,621 | $337,794 |
| 4 | $26,963 | $4,639 | $22,324 | $333,155 |
| 5 | $26,963 | $4,957 | $22,006 | $328,198 |
| 6 | $26,963 | $5,297 | $21,666 | $322,901 |
| 7 | $26,963 | $5,660 | $21,302 | $317,241 |
| 8 | $26,963 | $6,048 | $20,914 | $311,193 |
| 9 | $26,963 | $6,463 | $20,500 | $304,730 |
| 10 | $26,963 | $6,906 | $20,057 | $297,824 |
| 11 | $26,963 | $7,379 | $19,583 | $290,445 |
| 12 | $26,963 | $7,885 | $19,077 | $282,560 |
| 13 | $26,963 | $8,426 | $18,536 | $274,133 |
| 14 | $26,963 | $9,004 | $17,959 | $265,130 |
| 15 | $26,963 | $9,621 | $17,341 | $255,509 |
| 16 | $26,963 | $10,281 | $16,682 | $245,228 |
| 17 | $26,963 | $10,986 | $15,977 | $234,242 |
| 18 | $26,963 | $11,739 | $15,224 | $222,503 |
| 19 | $26,963 | $12,544 | $14,419 | $209,959 |
| 20 | $26,963 | $13,404 | $13,559 | $196,555 |
| 21 | $26,963 | $14,323 | $12,640 | $182,232 |
| 22 | $26,963 | $15,305 | $11,658 | $166,928 |
| 23 | $26,963 | $16,354 | $10,608 | $150,573 |
| 24 | $26,963 | $17,476 | $9,487 | $133,097 |
| 25 | $26,963 | $18,674 | $8,289 | $114,424 |
| 26 | $26,963 | $19,954 | $7,008 | $94,469 |
| 27 | $26,963 | $21,322 | $5,640 | $73,147 |
| 28 | $26,963 | $22,784 | $4,178 | $50,363 |
| 29 | $26,963 | $24,347 | $2,616 | $26,016 |
| 30 | $26,963 | $26,016 | $947 | $0 |
On a $350,000 loan at 6.65% over 30 years, the monthly principal-and-interest payment is $2,247. In the very first month, $1,940 of that goes to interest and only $307 to principal — the ratio flips slowly as the balance falls.
Early mortgage payments are mostly interest by design. The crossover point — where more of each payment reduces principal than pays interest — arrives around month 236. This is exactly why an extra payment early in the loan is worth far more than the same payment near the end: it removes interest that would otherwise accrue for the entire remaining term.
Adding just $200 of principal monthly would shorten the loan to 23 years, 9 months and save $112,195 in interest. Download the schedule to see how each extra payment reshapes the balance.
This schedule covers principal and interest only. Your actual monthly payment also includes property tax, insurance and possibly PMI. The mortgage calculator adds those to show your complete PITI payment.
Full mortgage payment calculatorWorked scenarios with the full analysis, so you can see how the numbers move before entering your own.
A typical 30-year fixed mortgage, showing how heavily the early years favor interest over principal.
Monthly payment
$2,247
On a $350,000 loan at 6.65% over 30 years, the monthly principal-and-interest payment is $2,247. In the very first month, $1,940 of that goes to interest and only $307 to principal — the ratio flips slowly as the balance falls.
Early mortgage payments are mostly interest by design. The crossover point — where more of each payment reduces principal than pays interest — arrives around month 236. This is exactly why an extra payment early in the loan is worth far more than the same payment near the end: it removes interest that would otherwise accrue for the entire remaining term.
Adding just $200 of principal monthly would shorten the loan to 23 years, 9 months and save $112,195 in interest. Download the schedule to see how each extra payment reshapes the balance.
The same balance on a 15-year term at a lower rate, dramatically compressing total interest.
Monthly payment
$2,982
On a $350,000 loan at 6.15% over 15 years, the monthly principal-and-interest payment is $2,982. In the very first month, $1,794 of that goes to interest and only $1,188 to principal — the ratio flips slowly as the balance falls.
Early mortgage payments are mostly interest by design. The crossover point — where more of each payment reduces principal than pays interest — arrives around month 46. This is exactly why an extra payment early in the loan is worth far more than the same payment near the end: it removes interest that would otherwise accrue for the entire remaining term.
Adding just $200 of principal monthly would shorten the loan to 13 years, 7 months and save $20,426 in interest. Download the schedule to see how each extra payment reshapes the balance.
A 30-year loan with a modest recurring overpayment, illustrating how extra principal reshapes the schedule.
Monthly payment
$2,247
On a $350,000 loan at 6.65% over 30 years, the monthly principal-and-interest payment is $2,247. In the very first month, $1,940 of that goes to interest and only $607 to principal — the ratio flips slowly as the balance falls.
Early mortgage payments are mostly interest by design. The crossover point — where more of each payment reduces principal than pays interest — arrives around month 135. This is exactly why an extra payment early in the loan is worth far more than the same payment near the end: it removes interest that would otherwise accrue for the entire remaining term.
Adding $300 of principal each month clears the loan in 21 years, 8 months instead of 30 years, cutting total interest from $458,876 to $310,694. Every extra dollar is a guaranteed, tax-free return equal to your 6.65% rate.
A mid-size balance on a 20-year term, a common choice for refinancing without restarting a full 30-year clock.
Monthly payment
$1,576
On a $220,000 loan at 6% over 20 years, the monthly principal-and-interest payment is $1,576. In the very first month, $1,100 of that goes to interest and only $476 to principal — the ratio flips slowly as the balance falls.
Early mortgage payments are mostly interest by design. The crossover point — where more of each payment reduces principal than pays interest — arrives around month 103. This is exactly why an extra payment early in the loan is worth far more than the same payment near the end: it removes interest that would otherwise accrue for the entire remaining term.
Adding just $200 of principal monthly would shorten the loan to 16 years, 2 months and save $34,340 in interest. Download the schedule to see how each extra payment reshapes the balance.
Amortization is the process of paying off a loan with equal payments over time, where each payment covers the interest accrued that month and uses the rest to reduce the principal. Because interest is charged on the outstanding balance, and that balance is highest at the start, early payments are mostly interest.
The schedule this calculator produces shows the split for every payment. In year one of a 30-year loan at 6.65%, roughly 80% of each payment is interest. By the final years, almost all of it reduces principal. The total payment never changes, but what it buys you shifts steadily from the lender's pocket to your equity.
Every dollar of extra principal removes the interest that dollar would have generated across the entire remaining term. Early in a 30-year loan, that's decades of avoided interest, which is why a $200 overpayment in year two can save several times its face value.
The same overpayment in year 28 saves almost nothing, because there's barely any term left for interest to accrue. If you plan to make extra payments, front-loading them produces by far the largest saving — and unlike refinancing, it costs nothing and carries no risk.
The downloadable CSV lists every month: the payment, how much went to principal versus interest, any extra principal, and the remaining balance. It's useful for tax planning (mortgage interest may be deductible if you itemize), for tracking when you'll cross 20% equity to drop PMI, and for verifying your servicer applied extra payments to principal rather than future interest.
One caution: this schedule models principal and interest only. Your real monthly payment usually also includes property taxes and insurance held in escrow, and PMI if your down payment was under 20%. Those don't appear here because they don't amortize — they're pass-through costs, not loan repayment.
The payment is fixed, but the principal/interest split is not. Early payments are mostly interest, which surprises borrowers who expect steady equity growth.
Extra payments only shorten the loan if applied to principal. Some servicers apply them to future interest by default — always specify and verify.
Restarting a full amortization clock puts you back at the interest-heavy beginning, which can increase lifetime interest even at a lower rate.
This schedule is principal and interest only. Your real payment includes taxes, insurance and possibly PMI — budget from the full figure.
Extra mortgage payments are illiquid — you can't easily get them back. Keep a cash cushion before accelerating the loan.
It's a table showing every payment over the life of a loan, split into how much reduces the principal and how much pays interest, plus the remaining balance after each payment. It reveals that early payments are mostly interest and later ones are mostly principal, even though the payment amount stays the same.
Because interest is charged on the outstanding balance, which is largest at the beginning. On a 30-year loan at 6.65%, roughly 80% of the first year's payments go to interest. As you pay the balance down, less interest accrues each month, so a growing share of the fixed payment reduces principal.
Often a large fraction of the loan amount. On a $350,000 loan at 6.65% over 30 years, total interest is roughly $460,000 — more than the amount borrowed. A shorter term or extra principal payments reduce this substantially; enter your numbers above to see the exact figure.
They should, but confirm with your servicer. Extra payments applied to principal shorten the loan and cut interest. Some servicers default to applying overpayments to future interest or the next month's payment unless you specify 'apply to principal', which provides no benefit. Check your statement after making one.
Yes. Use the Download CSV button above the schedule to export the full month-by-month table, including principal, interest, any extra payments and the running balance. It opens in Excel, Google Sheets or Numbers for your own planning and record-keeping.
Yes, and it matters. A new loan begins a fresh amortization schedule at the interest-heavy start, so refinancing a 30-year loan into another 30-year loan several years in can raise lifetime interest even at a lower rate. Refinancing into a shorter term, or making extra payments, avoids that reset.
The next calculations that usually follow this one.
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