In Excel: compute the payment with =PMT(rate/12, years*12, -amount), then split each month into interest (=balance*rate/12) and principal (=payment-interest).
On this page7
Calculate the level payment with =PMT(rate/12, years*12, -amount).
In the first schedule row, interest = opening balance × rate/12.
Principal = payment − interest; new balance = opening balance − principal.
Copy the row down for every month; the balance should reach zero on the final payment.
What this does
An amortization schedule shows where every payment goes: early on, most of it is interest and little touches the balance; over time the split flips and principal dominates. Seeing that crossover is what makes the schedule useful — it explains why overpaying early saves so much more interest than overpaying late. The same idea underpins a lot of everyday Excel work, so the few minutes spent getting it right here pay back across every sheet you build afterwards. Treat it as a pattern, not a one-off, and it stops being something you look up and starts being something you reach for. The difference between a quick fix and a sheet you can trust is the extra minute you spend validating “debt payoff worksheet excel free”. Start on a copy or a tiny sample, keep the affected sheet visible, and compare the result with the outcome you expected before you touch the real workbook. When a formula is involved, keep the inputs labelled beside it, reference cells instead of typing values, and apply number formatting only after the result checks out. The point is a workflow that saves repeating the same clicks every week, but the practical win is that someone else can open the file and understand what happened without asking you.
A worked example
On a €250,000 loan at 3.8% over 25 years, the payment is about €1,292. In month one, interest is 250000×3.8%/12 ≈ €792 and only ≈€500 reduces the balance. By the final year almost the entire payment is principal. The yearly table above aggregates all 300 months so you can read the principal/interest split at a glance. Use this fixed-payment schedule to compare constant-rate loan offers and read the yearly principal, interest and balance. Fees, variable rates and extra payments need a separately extended model. It is the difference between knowing your monthly payment and understanding the assumptions behind your loan schedule. Check the referenced cells, argument order and result type in your workbook. Start with the worked example before changing an input, then compare the changed result with the calculation you expected. An error value or a result of a different type is a reason to inspect the inputs and arguments.
In Google Sheets
Google Sheets support for this task has not been verified. Check the function, arguments and workflow in the target product before transferring the example. Matching formula notation does not establish identical behaviour. Nothing on this page is behind a login or a download: the exact answer is at the top, and the detail below it is there for when you need it. That is the whole promise here — the answer first, and just enough context to make it stick. For “debt payoff worksheet excel free”, keep the input cells and the result visible while you check the formula in Excel. Follow the worked example and change one input at a time. The steps explain the workbook calculation; this page does not run a live calculator for that task.
Common mistakes
- Letting rounding leave a tiny non-zero balance at the end — adjust the last payment to clear it.
- Applying the annual rate per month instead of rate/12.
- Forgetting that extra principal payments change every subsequent interest row.
- Building 360 rows by hand instead of copying one correct formula row down.
Frequently asked questions
Why is so much early payment interest?
Interest is charged on the outstanding balance, which is largest at the start. As the balance falls, the interest portion shrinks and principal grows.
Can this calculator model overpayments?
This calculator assumes equal monthly payments at a constant rate and has no extra-payment input. To compare overpayments, extend your worksheet schedule with the additional principal and recalculate the remaining balance and later interest.
Can I build this in Google Sheets?
Yes — PMT and the row formulas are identical in Google Sheets, so the same schedule works without any changes.