$300,000 loan · 6% APR · 30-year fixed
Paying off a $300,000 mortgage at 6%
Written for 30 years, this loan costs $1,798.65 a month in principal and interest, and $347,515 of interest by the final payment. Below is its full ledger: the schedule as the bank wrote it, and the corrections extra principal makes to it. Open this loan in the payoff calculator to run your own plan on it.
The ledger line
Principal and interest on the 360-payment schedule.
What the 6% costs if the loan runs its full 30 years.
54% of every dollar repaid is interest, not house.
Accruing on the full balance. Every prepaid dollar stops its share.
Principal and interest only; property taxes, homeowners insurance, and any PMI ride on top of the $1,798.65. If you put less than 20% down, the PMI removal date has its own ledger.
The ledger correction
The ledger correction
One flat $250 of extra principal a month, from the first payment on, rewrites this loan’s last line: 265 payments instead of 360. Make it your plan; the calculator opens this loan with the habit applied and dates it from your first payment.
How to read this ledger
Run the schedule as written and clearing the $300,000 takes $647,515: you send back $2.16 for every dollar you borrowed. At 6%, just over half of that is interest rather than house. And the meter never sleeps: interest runs $49.32 a day on day one and still $35.04 a day fifteen years in.
Every fix on this page is one move wearing different clothes: dollars that reach the balance ahead of schedule. Each of those dollars earns exactly 6% from the day it lands, guaranteed by arithmetic rather than by markets. The correction above prices a $250 habit because on a $300,000 balance that is the honest middle: big enough to delete years, small enough to survive a tight month. If the same dollars might work harder elsewhere, race them against investing before you commit; that page names the return they must beat.
What a little extra does to this loan
Each row reruns the $300,000 at 6% with one flat monthly habit next to the scheduled 360 payments. Extra principal on a 6% loan is a guaranteed 6% return; that’s the rate investing has to beat.
| Extra / mo | Payments | Interest saved | Time saved | Open in the calculator |
|---|---|---|---|---|
| $100 | 313 of 360 | $53,346 | 3 yrs 11 mos | Try it |
| $250 | 265 of 360 | $106,357 | 7 yrs 11 mos | Try it |
| $500 | 212 of 360 | $160,295 | 12 yrs 4 mos | Try it |
| $1,000 | 154 of 360 | $216,673 | 17 yrs 2 mos | Try it |
Every row assumes the habit starts with payment #1 and never misses. Start later and the numbers shrink; the calculator prices any start month, lump sums, and combinations.
Your first year, itemized
Twelve payments of $1,798.65 send $21,584 to the bank. $17,900 of it pays interest. $3,684 buys house. The balance after payment #12 reads $296,316.
Year one running 83% interest is not a penalty clause; it is simply what 6% on $300,000 comes to while the balance is still whole. The cure is extra principal, which skips the interest line entirely. The full schedule with extra payments lays out all 360 rows and marks the ones your own habit deletes.
The long middle of a 6% loan
Amortization is front-loaded: 83% of the very first payment ($1,500.00 of the $1,798.65) is interest. A payment finally sends more to principal than to interest at payment #223, in year 19. The balance crosses its halfway line at payment #252, in year 21. Interest reaches its own halfway line long before that: half of the $347,515 is already paid by payment #126, in year 11.
| On schedule | Balance left | Principal repaid | Interest paid so far |
|---|---|---|---|
| Year 5 | $279,163 | 7% | $87,082 |
| Year 10 | $251,057 | 16% | $166,895 |
| Year 15 | $213,147 | 29% | $236,904 |
| Year 20 | $162,011 | 46% | $293,687 |
| Year 25 | $93,036 | 69% | $332,632 |
That’s the honest shape of the schedule: five years in, 7% of the loan is gone but $87,082 of interest is already paid. If you’re likely to sell or refinance in the early years, the balance column is what you’ll still owe.
What one quarter point is worth here
Mortgage rates move in quarters, and on $300,000 a single quarter is real money. The same loan, one quarter either side of 6%:
| Rate | Payment | Vs this loan | Lifetime interest |
|---|---|---|---|
| 5.75% | $1,750.72 | $47.93 less | $330,259 |
| 6% (this loan) | $1,798.65 | … | $347,515 |
| 6.25% | $1,847.15 | $48.50 more | $364,975 |
Getting from 6% down to 5.75% is worth $17,256 over the full schedule; drifting up to 6.25% costs $17,460. Neither asks a single habit of you, which is why rate shopping comes first and extra principal second. Holding a live offer? The break-even calculator prices it against this loan honestly, closing costs included.
Four other ways to move the date
- The payment you almost make Your check says $1,798.65. Write $1,900 instead and the difference, $101.35 a month, deletes 3 yrs 11 mos and $53,940 of interest from this ledger. (The bare next hundred, $1,800, sits only $1.35 away here, which rounds to nothing on a 30-year ledger; this lever aims one rung higher.) Make the rounded check the plan.
- True bi-weekly halves 26 half-payments of $899.33 a year (the 13th-payment effect) retire this loan 5 yrs 6 mos sooner and cancel $74,436 of interest, without ever feeling like a bigger payment. Run the honest bi-weekly calendar, including the schemes that don’t work.
- A deadline instead of a habit Debt-free in 20 years instead of 30 takes $350.65 a month of extra principal on this loan. Pick your own target date and the ledger works backward to the required habit.
- The 15-year version The same $300,000 written for 15 years costs $2,531.57 a month ($732.92 more) and just $155,683 of lifetime interest, $191,832 less than the 30-year schedule. See the 15-year ledger.
Common questions
What is the monthly payment on a $300,000 mortgage at 6%?
$1,798.65 a month in principal and interest on a 30-year fixed schedule. Property taxes, homeowners insurance, HOA dues, and PMI are all on top of that; lenders quote the total as PITI, but only the $1,798.65 amortizes the loan. The same loan on a 15-year term runs $2,531.57.
How much interest does a $300,000 mortgage at 6% cost over 30 years?
$347,515 if the loan runs all 360 payments, on top of returning the $300,000 itself, for $647,515 in total. Put differently, 54% of every dollar this schedule collects is interest. That figure is the schedule’s, not fate’s: every dollar of extra principal retires debt that was compounding at 6% and shrinks it.
How much of the first payment goes to interest?
$1,500.00 of the first $1,798.65 payment (83%) is interest. The split improves by a few dollars every month, but on this loan a payment doesn’t send more to principal than to interest until payment #223, in year 19 of 30. Extra principal is the one lever that moves that date, because all of it lands on the balance.
How can I pay off a $300,000 mortgage at 6% faster?
A flat monthly habit is the simplest lever: $250 a month of extra principal finishes this loan in 22 yrs 1 mo instead of 30 years and cancels $106,357 of interest, guaranteed by arithmetic rather than by markets. The payoff calculator prices any habit, lump sum, or combination on this exact loan, and debt-free by date works backward from the finish line you want.
Do bi-weekly payments help on this loan?
A true accelerated bi-weekly plan ($899.33 every two weeks, 26 halves a year) pays this loan off 5 yrs 6 mos early and saves $74,436, because 26 halves are 13 full payments a year. Twice-a-month halves (24 a year) save almost nothing, and paid enrollment programs charge fees for math you can do free. The bi-weekly calculator compares all of them honestly on this loan.
What is a quarter point worth on a $300,000 mortgage?
At 6% this loan costs $1,798.65 a month; at 5.75% it would cost $1,750.72, which is $47.93 less every month and $17,256 less over the 360 payments. A quarter the other way, 6.25%, adds $48.50 a month and $17,460 of lifetime interest. Rate shopping and extra principal are separate levers, and this page prices both; if you hold a live offer, the refinance break-even calculator tells you honestly whether its closing costs earn their keep.
Should I round the $1,798.65 payment up to $1,900?
The bare next hundred barely registers here: $1,800 frees only $1.35 a month. One rung higher does the work: $1,900 sends $101.35 a month, finishes the loan 3 yrs 11 mos sooner, and cancels $53,940 of interest. Round numbers are the easiest habits to keep; pick one big enough to matter on this balance.
More loans on the ledger
The same 30-year ledger, written for this loan’s neighbors.
$300,000 at 5% 5.5% 6.5% 7% 7.5%
At 6% $150,000 $200,000 $250,000 $350,000 $400,000 $450,000 $500,000 $600,000 $750,000
Every amount-and-rate combination lives in the full index, and any loan, at any term, runs live in the payoff calculator.