Mortgage payoff worksheet A payoff estimate is more useful when it shows the remaining timeline, projected payoff
date, and how much of the next year of payments would still go to interest. This worksheet
starts from the current mortgage balance rather than the original loan.
Payoff assumptions
Use the current principal balance, current fixed interest rate, and current
principal-and-interest payment from the mortgage statement. The result estimates the
remaining payoff path from the statement date you choose.
Enter payoff details Enter the current mortgage balance, interest rate, and monthly principal-and-interest payment to estimate the remaining payoff path.
Mortgage payoff calculator guide: remaining balance, projected payoff date
A mortgage payoff calculator should not stop at one month count. This page estimates how long the remaining balance may take to clear at the current principal-and-interest payment, projects a payoff date from the selected statement date, and shows how much interest and principal are still likely to be paid over the remaining life of the mortgage.
What a mortgage payoff calculator is really answering
A payoff calculator starts from where the mortgage is now, not where it began. That means the key inputs are the current balance, the current interest rate, and the current principal-and-interest payment. From there, the useful questions are how many months remain, what calendar date the mortgage may end on, and how much additional interest is still likely to be paid if the payment stays unchanged.
That is different from an amortization calculator built around the original loan. Borrowers who search for a mortgage payoff calculator are usually already inside the mortgage and want to understand the remaining path from the latest statement rather than rebuild the full original loan from day one.
This worksheet therefore treats payoff as a remaining-balance problem. It shows the projected payoff date, remaining total paid, remaining interest, the next month of interest and principal split, and year-end payoff checkpoints so the path is not reduced to one headline number.
How this remaining-payoff worksheet builds the estimate
The worksheet begins with the current principal balance and the current monthly principal-and-interest payment. It converts the annual rate to a monthly rate, then simulates the remaining loan month by month. In each step, it calculates interest on the remaining balance, assigns the rest of the payment to principal, reduces the balance, and repeats until the mortgage is fully paid off.
Because the simulation starts from the current balance rather than the original mortgage amount, the result can estimate the remaining payoff path even when the original purchase date or original loan amount is no longer the main question. The selected statement date is then used as the calendar anchor so the tool can convert the remaining month count into a projected payoff date.
The year-end checkpoint rows are important because many borrowers want more than the final payoff date. They want to know what the balance could look like after one more year, how much cumulative interest would still have been paid by then, and how quickly the remaining balance is shrinking as the mortgage gets closer to its end.
Monthly interest = Current balance x monthly rate
Each payoff step starts by calculating one more month of interest on the current remaining balance.
Monthly principal = Payment - monthly interest
The part of the payment left after interest reduces the remaining mortgage balance.
Projected payoff date = Statement date + remaining payoff months
The worksheet uses the selected statement date as the starting point for the remaining payoff timeline.
Worked example: 250,000 balance, 6% rate, and 2,000 monthly payment
Suppose the current mortgage balance is 250,000, the interest rate is 6%, and the current principal-and-interest payment is 2,000 per month. That payment is high enough to reduce principal because it exceeds the next month of interest on the balance. From there, the worksheet simulates the remaining payoff month by month until the balance reaches zero.
The result shows the remaining months to payoff, converts that timeline into an approximate payoff date from the statement date, and reports the additional interest still likely to be paid if the mortgage continues on that path. It also shows what the next month of interest and principal may look like so the borrower can see how the current payment is being split right now rather than only at the end of the loan.
That combination matters because payoff planning is usually about sequencing real decisions. A borrower may be deciding whether to keep the same payment, refinance, or start extra overpayments. The remaining-path view is what makes those comparisons more concrete.
This is a planning estimate only. It assumes the current payment stays constant and that the mortgage is a standard fixed-rate amortizing loan from the current balance onward. It does not include taxes, insurance, HOA dues, escrow changes, lender fees, future rate changes, refinance events, or extra payments that may be added later.
It also does not replace the lender's official payoff statement. Mortgage servicers may quote daily interest, fees, or other settlement amounts that are not represented in this simplified projection. Use the worksheet to understand the remaining path, then confirm the real settlement figure with the servicer before acting on it.
Is a mortgage payoff estimate the same as an official payoff quote?
No. This page estimates the remaining path from the current balance and payment. The official payoff quote from the servicer can include daily interest, fees, or settlement details that are not represented in the worksheet.
Why does the monthly payment have to be higher than the next month of interest?
Because otherwise the payment would not reduce principal. If the payment only covers interest or falls short of it, the mortgage will not amortize on the path the calculator is trying to estimate.
Does this mortgage payoff calculator include taxes and insurance?
No. It focuses on the remaining principal-and-interest path only. Escrow items such as property taxes, homeowners insurance, mortgage insurance, and HOA dues are outside this worksheet.
Can I use this page to decide whether refinancing or extra payments make sense?
Yes, as a starting reference. The point of the payoff worksheet is to show the remaining path if nothing changes. That baseline can then be compared with refinance, acceleration, or recurring-overpayment scenarios in other mortgage tools.
