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Find out how long it could take to pay off your debt with our free Debt Payoff Calculator. Enter your balance, interest rate and monthly payment to estimate your payoff time, total interest and overall repayment cost.

Adjust your monthly payment to see how paying a little extra could help you pay off debt sooner and reduce interest.

Debt Payoff Calculator

How to Use This Debt Payoff Calculator

Enter a few details to estimate how long it could take to pay off your debt and how much interest you may pay.

Enter your total debt balance — the amount you currently owe.
Enter your annual interest rate — use the rate shown on your statement or loan agreement.
Enter your monthly payment — the amount you currently pay or plan to pay each month.
Add an extra monthly payment — optional, but useful for seeing how additional repayments could affect your payoff time.
Review your results — see your estimated payoff time, payoff date, total interest and total amount paid.

Try increasing your monthly payment to compare different scenarios. Even a small extra payment may help reduce your payoff time and total interest.

Tip: Make sure the monthly payment you enter is high enough to cover the interest being charged.

What Is a Debt Payoff Calculator?

A debt payoff calculator estimates how long it could take to repay a debt based on your current balance, interest rate and monthly payment. It can also show your estimated total interest, total amount paid and payoff date.

Unlike a standard loan calculator that estimates repayments on a new loan, a debt payoff calculator starts with debt you already have and shows how your payment amount could affect the time and cost of becoming debt-free.

It can be useful for:

Credit card debt — estimate how long it may take to clear a balance.
Personal loans — see the effect of different monthly payments.
Car loans — test how extra repayments could change your payoff time.
Other interest-bearing debt — estimate total interest and repayment costs.
Debt payoff planning — compare payment amounts and work toward a target payoff date.

Keep in mind: This calculator works best when the debt has a consistent interest rate and regular monthly payments. Actual lender calculations, fees and payment timing may produce different results.

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The Real Cost of Carrying Debt

A debt payoff calculator can show you something your current balance cannot: how much the debt could actually cost by the time you finish paying it off.

Interest can make the final cost significantly higher than the amount you originally owe. Increasing your monthly payment can reduce both your payoff time and the amount of interest you pay.

Example: $3,000 Credit Card Balance at 20% Interest

Paying $100 per month

Estimated payoff time: about 3 years 6 months
Estimated interest: about $1,190
Estimated total paid: about $4,190

Paying $200 per month

Estimated payoff time: about 1 year 6 months
Estimated interest: about $480
Estimated total paid: about $3,480

Increasing the payment from $100 to $200 could save roughly 2 years of repayments and around $710 in interest.

Example: $8,000 Credit Card Balance at 20% Interest

Paying $200 per month

Estimated payoff time: about 5 years 7 months
Estimated interest: about $3,080
Estimated total paid: about $11,080

Paying $350 per month

Estimated payoff time: about 2 years 6 months
Estimated interest: about $1,760
Estimated total paid: about $9,760

The higher payment could cut approximately 3 years from the repayment period while substantially reducing interest.

Example: $15,000 Personal Loan Balance at 10% Interest

Paying $300 per month

Estimated payoff time: about 5 years 6 months
Estimated interest: about $4,580
Estimated total paid: about $19,580

Paying $450 per month

Estimated payoff time: about 3 years 4 months
Estimated interest: about $2,640
Estimated total paid: about $17,640

The difference shows why comparing payment amounts can be useful before deciding on a debt repayment strategy.

These examples are estimates only. Actual interest and payoff times can vary depending on how your lender calculates interest, fees and when payments are applied. Use the calculator above with your own balance, interest rate and payment amount for a personalised estimate.

Debt Payoff Strategies That Work

If you have multiple debts, choosing a repayment strategy can help you decide which debt to tackle first. Two common approaches are the debt avalanche and debt snowball methods.

Debt Avalanche — Highest Interest First

With the debt avalanche method, you make the required payments on all your debts while directing extra money toward the debt with the highest interest rate.

Once that debt is cleared, you move the extra payment to the debt with the next-highest rate.

Best for: Reducing the total amount of interest you pay.

Because higher-interest debt is targeted first, the avalanche method will generally minimise interest costs compared with prioritising debts solely by balance, assuming payments and other conditions are the same.

Debt Snowball — Smallest Balance First

With the debt snowball method, you focus extra repayments on your smallest debt balance first, regardless of its interest rate.

Once the smallest debt is paid off, you roll that payment into the next-smallest debt.

Best for: People who find motivation in clearing individual debts and seeing faster progress.

The snowball method may cost more in interest than the avalanche approach, but the quicker early wins can make the repayment plan easier for some people to maintain.

Hybrid Approach

You don't necessarily have to use only one strategy. You could clear one or two small debts first for momentum and then switch to targeting the remaining debt with the highest interest rate.

Which Debt Payoff Method Is Better?

If your main goal is to minimise interest, the debt avalanche will usually be the stronger mathematical choice.

If your main goal is to stay motivated by eliminating balances, the debt snowball may suit you better.

Whichever method you choose, consistency matters. Use the Debt Payoff Calculator above to test different monthly payments and see how they could affect your payoff time and total interest.

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Practical Ways to Pay Off Debt Faster

Once you have chosen a payoff strategy, a few practical changes can help reduce your repayment time and potentially lower the interest you pay.

Increase your monthly payment
Even a small increase can shorten your payoff timeline. Use the calculator above to compare different payment amounts and see how an extra $50, $100 or $200 per month could affect your results.

Make extra repayments when you can
Tax refunds, bonuses or other unexpected income can be put toward your debt. A lump-sum payment reduces your outstanding balance, which may reduce future interest on debts where interest is calculated on the remaining balance.

Consider more frequent repayments
If your lender allows extra or more frequent repayments without fees, paying more often may help you reduce the balance sooner. Check your loan terms first, as repayment rules vary between lenders.

Avoid adding new debt
Paying down existing balances becomes harder if you continue borrowing at the same time. Where practical, limit new credit purchases while working toward your payoff goal.

Consider debt consolidation carefully
If you have several high-interest debts, consolidating them into one lower-rate loan may reduce interest and simplify your repayments. However, always compare the interest rate, fees, loan term and total repayment cost before switching.

Use the Debt Consolidation Calculator to compare your existing debts with a potential consolidation loan.

Redirect savings toward your debt
Review recurring expenses such as subscriptions, memberships and discretionary spending. Even a manageable amount redirected toward debt each month can make a difference over time.

Before making extra repayments: Check whether your lender charges early repayment fees or limits additional repayments, particularly on fixed-rate loans.

Staying Motivated on Your Debt Payoff Journey

Paying off debt can take months or even years. Having a clear plan and a way to measure your progress can make it easier to stay consistent.

Set a target payoff date
Use the calculator above to estimate when you could become debt-free based on your current payment. Then experiment with extra payments to see whether you can bring that date forward.

Track your progress
Keep a simple record of your remaining balance. Seeing it decrease month by month can make progress easier to recognise, even when your final payoff date still feels far away.

Create smaller milestones
Instead of focusing only on the final balance, set smaller goals such as paying off 25%, 50% and 75% of your debt. Each milestone gives you another opportunity to recognise your progress.

Automate your repayments
Where possible, schedule your debt payments automatically around payday. Automation can help you maintain consistent repayments without having to make the decision manually each month.

Review your plan regularly
Your income, expenses and interest rates can change. Revisit your debt payoff plan occasionally and adjust your payment amount if your financial situation changes.

Get help if repayments become difficult
If you are having trouble managing debt or keeping up with repayments, consider speaking with a qualified financial counsellor. Free financial counselling services are available in Australia and can help you understand your options.

Frequently Asked Questions

1. What is a debt payoff calculator?
A debt payoff calculator estimates how long it may take to repay your debt based on your balance, interest rate and monthly payment. It can also estimate the total interest and total amount you may pay.

2. How can I pay off debt faster?
Increasing your regular payment, making extra repayments and applying lump sums to your balance can help reduce your payoff time. Check whether your lender charges fees or restricts additional repayments.

3. Does paying extra reduce the interest on my debt?
Generally, paying extra can reduce the outstanding balance sooner and therefore reduce future interest. The exact savings depend on your interest rate, repayment structure, fees and how your lender calculates interest.

4. Should I use the debt snowball or debt avalanche method?
The debt avalanche targets the highest-interest debt first and will generally minimise interest costs. The debt snowball targets the smallest balance first and may provide quicker motivational wins.

5. What happens if my monthly payment does not cover the interest?
If your payment is too low to cover the interest being charged, your balance may not decrease and could potentially grow. Increasing your payment or discussing your options with your lender may be necessary.

6. Can I use this calculator for credit card debt?
Yes. You can use it to estimate the payoff time and interest cost of credit card debt by entering your current balance, annual interest rate and planned monthly payment. Actual credit card calculations may differ because of fees, purchases and changing balances.

7. Can I use this calculator for personal loans and car loans?
Yes. It can provide an estimate for many interest-bearing debts with regular repayments. However, your actual loan may include fees, variable interest rates, early repayment charges or other conditions that affect the final result.

8. Is the payoff date shown by the calculator exact?
No. The payoff date is an estimate based on the information you enter and the calculator's assumptions. Your lender's calculations, payment dates, fees and interest changes can affect the actual payoff date and amount.

Your Debt-Free Date Starts Here

Paying off debt can feel much more manageable when you have a clear target. Knowing your estimated payoff date — and seeing how extra repayments could bring that date closer — can help you build a repayment plan that fits your budget.

Use the Debt Payoff Calculator above to compare different monthly payment amounts and see how they may affect your payoff time, total interest and overall cost.

Then explore our other free calculators to help you manage debt, plan repayments and make more informed financial decisions.

Remember: Your results are estimates. Actual repayment amounts and payoff dates may vary depending on your lender, interest calculations, fees and loan terms.