Personal Loan Payoff Calculator: How to Pay Off a Personal Loan Years Early

The short version. On an $18,000 personal loan at 13.5% APR with a 60-month term, the monthly payment is about $414 and total interest is roughly $6,850. Adding an extra $100 per month shortens the payoff to about 45 months and cuts interest by around $1,700. Refinancing to 10.5% APR can save another $1,100 on top of that — but only if there is no prepayment penalty and the origination fee is reasonable.

If you want to run the numbers on your own balance, APR, and term, the Unburden loan payoff calculator handles the amortization and the extra-payment scenario in one screen. The rest of this guide explains what the calculator is doing under the hood and how to use the results.

What a Personal Loan Payoff Calculator Actually Does

A personal loan is an installment loan: a fixed lump sum, a fixed APR, a fixed term, and a fixed monthly payment that retires the balance to zero by the last month of the schedule. Once the loan is funded, the rate and the payment are locked. The only variables you control after that are how much extra you pay and whether you refinance.

A personal loan payoff calculator answers three questions:

• What is my monthly payment given the loan amount, APR, and term?
• What does the amortization schedule look like month by month — how much of each payment is interest, how much is principal?
• What does an extra payment do to the payoff date and the total interest paid?

Definition. Personal loan amortization is the process by which a fixed monthly payment is split between interest charged on the remaining balance and principal that retires the debt. Early payments are heavily weighted toward interest; later payments swing toward principal. A payoff calculator runs the split month by month and reports the payoff date and total interest paid.

That last calculation is where the leverage hides. The math feels small in the first month and obvious by the last one.

The Math, Worked End to End

Take a $18,000 personal loan at 13.5% APR on a 60-month term. The standard amortization formula gives a monthly payment of about $414.18. Here is what the first six months of that schedule look like.

After six months and $2,484 in payments, the balance has dropped from $18,000 to $16,694. About 49% of each payment is going to interest. That is much better than a credit card at 25% APR, but it is still a meaningful tax on the loan.

By month 30 — the halfway point of the term — the interest share has fallen to roughly 30% per payment. By month 55, it is under 10%. By month 60, the loan is closed and the lender has collected $24,851 against your $18,000 borrowed. Total interest paid: about $6,851.

That is the cost of borrowing as designed. It is also the number an extra payment shrinks the fastest.

What an Extra $100 a Month Actually Does

Now run the same loan with $514 a month instead of $414 — $100 of extra principal each month, every month. The math compounds quietly.

An extra $100 a month — call it a streaming subscription, a phone bill, a few takeout meals — kills 15 months of debt and $1,713 of interest. An extra $200 a month cuts the loan in half: payoff in three years instead of five.

This is leverage, and it is the cleanest version of leverage personal finance offers. There is no negotiation, no credit pull, no application. Each extra dollar reduces the principal the interest is calculated against, which reduces next month's interest, which leaves more of next month's regular payment to reduce principal. The effect compounds.

Refinance vs. Extra Payments: How to Decide

Refinancing replaces your existing loan with a new one, usually at a lower APR. The math favors refinancing when three things are true: rates have fallen since you borrowed, your credit score has held up or improved, and the new loan has no origination fee large enough to swallow the savings.

Rule of thumb. Refinancing makes sense when the new APR is at least 2 percentage points lower than your current one and the origination fee plus any prepayment penalty is under one-third of the projected interest savings. Below 2 points, the savings often get eaten by fees and the time required to shop and apply.

Say you are 12 months into the $18,000 loan with $16,000 left, and you find a new lender offering 10.5% APR on a 48-month refinance. The choice tree:

The clear winner is refinancing and keeping the extra payment. The lower APR slashes the per-month interest charge, and the extra principal compounds against that lower charge. Total savings versus the do-nothing path: roughly $1,936 and 11 months.

The do-nothing line is the dangerous one. It feels safe — the loan is on autopilot — but inertia is its own cost. A 90-second check on refinance rates twice a year is one of the highest hourly wages most borrowers will ever earn.

The Canadian Context: Rates, Disclosure, and Prepayment

If you are borrowing in Canada, three layers of context shape what the personal loan market actually offers.

The Bank of Canada policy rate drives the cost of money for every domestic lender. After the easing cycle that began in early 2024 and continued through 2025, the policy rate sat at 2.75% as of Q2 2026. Unsecured personal loan APRs from major chartered banks have followed it down to a typical range of 9% to 14% for borrowers with prime credit, with subprime offers running 18% and higher.

The Financial Consumer Agency of Canada requires lenders to disclose the APR, the total cost of credit, and any prepayment terms in plain language at signing. This is the document to read before you focus on monthly payment marketing copy. If the disclosure section labeled prepayment or early payment mentions a penalty, that is the number that decides whether an extra payment helps you or just rebates the lender.

Credit reporting in Canada is handled by Equifax Canada and TransUnion Canada. A new personal loan generally adds an inquiry and a fresh installment tradeline, both of which can dent a credit score by a few points for the first three to six months before installment age and on-time payment history start to lift the score again. Refinancing repeats the cycle, which is part of why you do not want to do it for a small rate improvement.

Canadian prepayment rule. Most unsecured personal loans from federally regulated lenders in Canada allow unlimited extra principal payments with no penalty. Penalties are more common on closed-term mortgages, some secured auto loans, and certain consolidation products. The contractual prepayment clause overrides any marketing language about "no penalty" elsewhere.

The US Context: APR Benchmarks and the Federal Reserve

In the United States, the personal loan market is broader and more competitive than the Canadian one, mostly because online lenders like SoFi, LendingClub, Upstart, and a long tail of credit unions all compete on APR and origination fee. According to the Federal Reserve G.19 Consumer Credit release, the average APR on a 24-month personal loan from a commercial bank sat at 12.32% in Q1 2026. That is the bank-only average. Online lender quotes for prime borrowers ran 7% to 11% in the same window, with subprime offers north of 25%.

Two structural items to read carefully in a US offer:

• Origination fee. US lenders frequently deduct a 1% to 8% origination fee from the loan amount before it lands in your account. A $20,000 loan at a 5% origination fee funds at $19,000 but accrues interest on $20,000. The effective APR is higher than the stated APR.
• Prepayment penalty. Most US personal loans have no prepayment penalty, but a small slice of subprime offers do. The Truth in Lending Act disclosure box on every US loan agreement must surface this in standardized language.

Where Personal Loan Payoff Fits in a Broader Plan

Personal loans typically sit alongside other balances: credit cards, a car loan, maybe student debt. The order you attack them in matters more than the per-loan strategy.

The standard frameworks:

• The avalanche method orders debts highest-APR-first, which minimizes total interest paid across the whole stack. If your personal loan is at 13.5% and your credit card is at 23%, the card eats the extra payment first.
• The snowball method orders smallest-balance-first to generate quick wins. That is sometimes the right call psychologically even when the math says otherwise.
• The Momentum strategy — built into the Unburden app — is designed to never cost more than avalanche on total interest paid while pulling forward the early wins that snowball is good at.

The decision rule. A personal loan at 12% to 14% APR is rarely the highest-interest balance on a typical statement. Credit cards almost always are. Extra dollars should go to the highest-APR balance first; the personal loan gets paid down by its regular payment until the cards are gone. Then the extra payment moves to the personal loan and the math you saw above kicks in at full force.

The other variable is the Burden Score — Unburden's measure of how exposed your finances are to a single missed paycheck or expense shock. A personal loan with a fixed monthly payment is generally a lower-burden form of debt than a credit card with a variable balance, because the payment is predictable. Refinancing or consolidating high-rate variable debt into a fixed-payment personal loan often improves the Burden Score even before any extra principal payment.

When Not to Rush the Payoff

Extra principal is almost always good, but there are three cases where the math points elsewhere.

You have no emergency fund. An accelerated payoff plan that empties your buffer turns the next surprise — a car repair, a vet bill, a missed week of work — into a new credit card balance at a higher APR than the loan you just paid down. A starter emergency fund of one month of essential expenses sits ahead of extra loan payments in most plans. More on the emergency-fund question.

Your employer match is unfunded. If you have access to a workplace retirement plan with a matching contribution and you are not capturing the full match, those dollars are a 50% or 100% immediate return on contribution. That return beats any personal loan APR under 25%. Capture the match, then accelerate the loan.

Your APR is already low. If you locked in a personal loan at 6% to 8% APR, the per-month interest cost is modest. Liquid savings yielding 4% to 5% in a high-interest account or GIC eat most of the spread. The payoff is still good; it is just no longer the best dollar in the budget.

Run the Numbers on Your Own Loan

The patterns above hold across most personal loans, but the dollar amounts depend on your balance, your APR, your remaining term, and how much extra you can realistically commit. The Unburden loan payoff calculator takes those four inputs, returns the monthly payment, the amortization schedule, and the extra-payment scenario, and shows the side-by-side savings without storing any of it.

One run of the calculator usually settles three questions at once: when will this loan be gone, what will it cost me to get there, and how much faster can I move if I find $50 or $100 a month? Those are the numbers that turn an abstract loan into a concrete plan.

Common Questions

How do I calculate the payoff time on a personal loan?

Take the loan balance, the APR divided by 12 (the monthly rate), and the fixed monthly payment. Each month, interest equals the balance times the monthly rate; the remainder of the payment reduces principal. A personal loan payoff calculator runs that loop until the balance hits zero and returns the number of months. On an $18,000 personal loan at 13.5% APR with a $414 monthly payment, the calculator returns 60 months and total interest of about $6,850.

Does paying extra on a personal loan have a prepayment penalty in Canada?

For most unsecured personal loans from Canadian banks and federally regulated lenders, you can pay extra principal at any time with no prepayment penalty. Penalties are more common on closed-term mortgages and certain auto and consolidation loans. Read the loan agreement section labeled prepayment, early payment, or accelerated payment before sending a lump sum. The Financial Consumer Agency of Canada requires lenders to disclose prepayment terms in plain language.

Is it better to refinance a personal loan or pay extra each month?

Refinancing wins when the new APR is at least 2 percentage points lower and the origination fee plus any prepayment cost is less than the interest saved over the new term. Adding extra payments wins when rates have risen since you borrowed or your credit score has dropped. The strongest move is usually to refinance to a lower APR and keep making the original payment, which combines both effects.

How much faster does a personal loan get paid off with an extra $100 per month?

On an $18,000 personal loan at 13.5% APR with a base monthly payment of $414, adding $100 per month shortens the payoff from 60 months to about 45 months and cuts total interest from roughly $6,850 to $5,140. That is 15 months sooner and approximately $1,700 less in interest, from $100 extra per month.

What is the difference between a personal loan and a debt consolidation loan?

A personal loan is a lump-sum installment loan that can be used for any purpose. A debt consolidation loan is a personal loan marketed specifically to refinance existing high-rate balances, usually credit cards, into a single fixed payment. The product is the same under the hood. The difference is intent and, sometimes, the lender pays your creditors directly to make sure the consolidation actually happens.

Can I pay off a personal loan with a HELOC?

You can, and the math often favors it because home equity line of credit rates tend to sit below unsecured personal loan rates. The tradeoff is real: you are converting unsecured debt into debt secured by your house, which raises the consequence of a missed payment. The move makes sense when your income is steady, your equity cushion is generous, and you have a written plan to actually retire the HELOC balance, not just rotate it.

Unburden is a planning tool, not a financial advisor. The figures above are illustrative calculations based on the stated balance, APR, and term; individual results vary based on the actual amortization, fees, and prepayment terms in your loan agreement. This is educational information, not financial advice. If you are carrying debt you cannot see a way out of, consider speaking with a Licensed Insolvency Trustee.