What Happens If You Pay $200 Extra on Your Mortgage?
Last updated October 2026
Quick answer
On a $400,000 mortgage at 6.25% over 30 years, paying an extra $200 a month toward principal pays the loan off 5 years 6 months early and saves $104,950 in interest. You make 294 payments instead of 360, and total interest falls from $486,632 to $381,683. Every dollar of that $200 goes straight to your balance, so it also reduces the interest you are charged in every remaining month.
The example, in full
Here is the whole picture side by side. Same loan, same rate, same start date — the only difference is $200 a month.
| Minimum payment | +$200/month | Difference | |
|---|---|---|---|
| Loan amount | $400,000 | $400,000 | — |
| Rate | 6.25% | 6.25% | — |
| Monthly payment | $2,462.87 | $2,662.87 | +$200.00 |
| Number of payments | 360 | 294 | −66 |
| Loan paid off in | 30 years | 24 yrs 6 mos | 5 yrs 6 mos sooner |
| Total interest | $486,632 | $381,683 | −$104,950 |
| Total paid | $886,633 | $782,884 | −$103,749 |
Read the bottom rows again. You put in an extra $200 a month for 24½ years — about $58,800 of your own money — and it eliminates $104,950 of interest. Each extra dollar removes roughly $1.78 of future interest, and you get the dollar back too, in the form of a house you own outright six years sooner.
Worked example
$400,000 loan · 6.25% fixed · 30-year term
$104,950
Less interest
5 yrs 6 mos
Off the loan
Time to pay off
Total interest
Estimates only, based on a 30-year fixed loan at a constant rate — not your actual loan terms. Your servicer’s numbers may differ by a few dollars from rounding.
How the calculation works
The mechanism is simpler than it looks. Interest on a mortgage is recalculated every single month against whatever you currently owe:
monthly interest = current balance × (annual rate ÷ 12)On payment one of this loan:
| Minimum payment | +$200/month | |
|---|---|---|
| Starting balance | $400,000.00 | $400,000.00 |
| Interest charged | $2,083.33 | $2,083.33 |
| Goes to principal | $379.54 | $579.54 |
| Balance after | $399,620.46 | $399,420.46 |
Only $379.54 of your standard $2,462.87 payment actually reduces the debt — 15.4% of it. The other $2,083.33 is rent on the money. Your extra $200 skips the interest line entirely and lands wholly on the balance.
Now the compounding starts. Because month two begins at $399,420.46 instead of $399,620.46, the interest charged is fractionally lower — so slightly more of your normal payment goes to principal too. That advantage grows every month for 24 years. It is not the $200 that saves $104,950; it is the $200 plus everything it sets in motion.
What actually changes
Principal
Your balance drops faster from the very first payment, and the gap widens continuously. After 10 years you owe $303,726 instead of $336,951 — $33,225 less.
Interest
Total interest falls by $104,950. This happens two ways: you make 66 fewer payments, and every payment you do make carries a smaller interest charge than it otherwise would have.
Payoff date
The loan ends after 294 payments instead of 360 — five and a half years earlier. This is the change most people feel most.
Equity
Equity is your home's value minus what you owe, so a faster-falling balance means faster-growing equity. On a $500,000 home with this loan:
| Year | Equity (minimum) | Equity (+$200/mo) | Extra equity |
|---|---|---|---|
| 5 | $126,651 | $140,695 | +$14,044 |
| 10 | $163,049 | $196,274 | +$33,225 |
| 15 | $212,759 | $272,179 | +$59,420 |
| 20 | $280,650 | $375,845 | +$95,195 |
If you are paying private mortgage insurance, this matters twice: reaching 80% loan-to-value sooner is what gets PMI cancelled, which is a second saving on top of the interest.
Your monthly payment does not change
Worth stating plainly, because it surprises people. On a fixed-rate mortgage, extra principal does not reduce your required payment. It shortens the loan instead — fewer payments of the same size. Only a formal recast lowers the payment, and that costs more interest overall.
What about $100, $500 or $1,000?
Same loan, different amounts:
| Extra per month | Payments | Paid off in | Time saved | Interest saved |
|---|---|---|---|---|
| $0 | 360 | 30 yrs | — | — |
| $100 | 323 | 26 yrs 11 mos | 3 yrs 1 mo | $59,744 |
| $200 | 294 | 24 yrs 6 mos | 5 yrs 6 mos | $104,950 |
| $300 | 271 | 22 yrs 7 mos | 7 yrs 5 mos | $140,651 |
| $500 | 234 | 19 yrs 6 mos | 10 yrs 6 mos | $193,929 |
| $1,000 | 178 | 14 yrs 10 mos | 15 yrs 2 mos | $273,125 |
The returns diminish as the amount grows. Going from $0 to $100 buys you $59,744 of savings; going from $900 to $1,000 buys far less. The first extra dollars are the most valuable ones, which is a useful thing to know if you are deciding between "a small amount now" and "a larger amount later." Small and now usually wins.
Timing matters as much as size
These figures assume you start in month one. Starting the same $200 in year 10 of the loan saves considerably less, because there are fewer remaining months for the compounding to work through. If you are going to do it, earlier is worth more than bigger.
How to actually make the payment
This trips people up more than the math does.
- Designate it as principal. Most servicer portals have a "principal only" or "additional principal" field. Use it.
- Do not just pay a bigger number. Left unlabelled, many servicers apply the surplus to your next scheduled payment or park it in a suspense account. Neither reduces your balance, and the second earns you nothing at all.
- Verify on your next statement. Your balance should be about $200 lower than the schedule predicts. If it is not, the money went somewhere else.
- Check for a prepayment penalty. Uncommon on modern US conforming loans, but they exist on some older and non-qualified mortgages.
- Do not confuse it with escrow. Extra money added to an escrow account pays future taxes and insurance, not your loan.
Things to consider
- An extra $200 a month is a genuinely good use of money for many homeowners, and the wrong one for some. Before committing:
- Emergency fund first. That $200 in a savings account is available when the roof leaks. The same $200 in your mortgage is not.
- Higher-interest debt first. At 22% credit card interest, redirecting the $200 there beats a 6.25% mortgage by about 16 percentage points.
- Employer match first. A 50% match is an immediate 50% return.
- Your rate matters. At 6.25% the guaranteed return is attractive. At 3% it is much less so.
- Liquidity. Every extra dollar is locked up until you sell or refinance.
- Opportunity cost. The same $200 invested for 30 years at 7% would grow to roughly $244,000 — more than the interest saved, though without any guarantee. See mortgage payoff vs. investing for the full comparison.
- How long you'll stay. If you plan to move in five years, most of the projected saving never materialises.
Run your own numbers
Track your actual mortgage
The figures on this page are an example loan. MortMetrix builds your full amortization schedule from your real balance, rate and term, then shows exactly what any extra payment does to your payoff date, lifetime interest and equity.
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Frequently asked questions
How much do you save paying $200 extra a month on a mortgage?
On a $400,000 30-year mortgage at 6.25%, an extra $200 a month saves $104,950 in interest and pays the loan off 5 years 6 months early. The exact saving depends on your balance, rate and how many years remain — a higher rate or a longer remaining term both increase it.
Does paying $200 extra lower my monthly payment?
No. On a fixed-rate mortgage the payment stays the same and the loan gets shorter — 294 payments instead of 360. A recast is the only way to lower the payment itself, and it results in more total interest.
Is it better to pay $200 extra monthly or $2,400 once a year?
Monthly. The money reaches your principal sooner and starts suppressing interest sooner. On our loan the monthly approach saves about $4,000 more than the same total paid once a year.
How do I make sure the extra $200 goes to principal?
Use the "principal only" option in your servicer's payment portal, or send written instruction with the payment. Then check your next statement — if the balance did not drop by the extra amount, the money was applied to something else.
Should I pay $200 extra or invest it?
Paying extra is a guaranteed 6.25% return; investing is an uncertain, historically higher one. Most people should have an emergency fund, no high-interest debt, and their full employer match before doing either. See should you pay off your mortgage early.
Related guides
How to Pay Off Your Mortgage Early
Seven ways to clear a mortgage ahead of schedule, each with the years and interest it saves.
Read moreHow Much Does One Extra Mortgage Payment Save?
One extra payment a year vs. one payment ever — two very different answers, both worked through.
Read moreHow Extra Mortgage Payments Work
The mechanism: extra principal has no interest attached, so it compounds against every remaining month.
Read moreHow Extra Payments Reduce Mortgage Interest
Interest is rate times balance. Shrink the balance once and you shrink every future charge.
Read moreFigures on this page are generated from the same amortization engine that powers the MortMetrix dashboard, using the example loan stated in each table. They are estimates based on a fixed-rate loan at a constant rate and are not your actual loan terms. This is educational information, not financial advice.