Debt Avalanche Calculator
Pay off debt the cheapest way — highest interest rate first. See your payoff date and total interest.
Your Debts
$570 covers the minimums · $380 extra goes at the focus debt
Debt-Free In
2 yr 10 mo
Avalanche method · $950 a month
Clearing $27,500 of debt costs you $4,568 in interest with the avalanche method — paying highest interest rate first — the mathematically cheapest order.
Total Interest
$4,568
Across all debts, until debt-free
Total Paid
$32,068
Balances + all interest
Starting Debt
$27,500
3 debts
Monthly Budget
$950
Minimums: $570
Payoff Order — Avalanche Method
| # | Debt | Cleared After | Interest Paid |
|---|---|---|---|
| 1 | Credit Card | 1 yr 8 mo | $1,967 |
| 2 | Personal Loan | 2 years | $573 |
| 3 | Car Loan | 2 yr 10 mo | $2,027 |
Debt Elimination Timeline
Your total debt falling month by month with the avalanche method — debt-free by month 34.
Avalanche vs Snowball
avalanche
Selected- Debt-free in
- 2 yr 10 mo
- Total interest
- $4,568
- First debt cleared
- Credit Card
snowball
- Debt-free in
- 2 yr 11 mo
- Total interest
- $5,247
- First debt cleared
- Personal Loan
Avalanche saves $679 more in interest. Snowball clears your first debt sooner — a motivational head start. Pick the one you'll actually stick with.
How to use this calculator
- List each debt — its name, current balance, interest rate (APR), and minimum monthly payment. Add or remove rows as needed.
- Enter your total monthly budget — everything you can put toward debt each month. It must at least cover the sum of every minimum payment.
The calculator orders your debts highest-rate first, then shows your debt-free date, total interest, the order debts are cleared, a month-by-month elimination chart, and how the avalanche method compares against the snowball method.
How the avalanche method works
The debt avalanche is the cheapest possible repayment order. Every month the plan does three things:
- Pays every minimum on every open debt, so all accounts stay current.
- Funnels the leftover budget — your total budget minus the minimums — entirely at the debt with the highest interest rate.
- Rolls the payment forward — when the highest-rate debt is cleared, its whole payment joins the next-highest rate. This is the “debt stacking” effect, and it is why later debts clear far faster than the first.
The logic behind it is one sentence: a dollar saves the most interest when it is applied where interest is charged fastest. Because the avalanche always attacks the highest rate, no other payoff order can clear the same debts for less total interest on the same budget.
Avalanche vs snowball — the honest trade-off
The debt snowball method pays the smallest balance first instead of the highest rate. It usually costs a little more in interest, but it clears your first debt faster and that quick win keeps many people motivated.
- Avalanche — mathematically cheapest. Best if you are disciplined and want to minimise interest.
- Snowball — fastest first win. Best if you need visible progress to stay on track.
This calculator runs both and shows them side by side, so you can see exactly how much the avalanche saves for your debts — and decide whether that saving outweighs the snowball’s motivational head start. If your debts all have similar rates, the gap is small and either method is fine. If you carry one large high-rate balance, avalanche’s advantage can be substantial.
The limits of an estimate
This is a projection that assumes you pay the same total budget every month and that interest rates do not change. It does not model late fees, promotional rates expiring, or new borrowing. Use it to set a realistic debt-free target — then keep the plan steady, because the avalanche only delivers its savings if you stick with it.
Frequently Asked Questions
What is the debt avalanche method? ▾
The debt avalanche method pays your debts off in order of interest rate — highest APR first. You make the minimum payment on every debt, then put every spare dollar toward the single highest-rate debt until it is gone. When that debt is cleared, its whole payment rolls onto the next-highest rate. Because the most expensive balance is always shrinking fastest, avalanche clears your debt for the least possible total interest. It is the mathematically optimal payoff order.
Is the avalanche method really the cheapest way to pay off debt? ▾
Yes — for a fixed monthly budget, the avalanche method always costs the same or less in total interest than any other order, including the snowball method. The reason is simple: every dollar of extra payment does the most good when it is applied to the highest interest rate, because that is where interest accrues fastest. No payoff order can beat it on cost. The only thing that beats avalanche on cost is paying more each month.
When does the avalanche method beat the snowball method? ▾
Avalanche always wins on total interest, but the size of the win depends on your debts. The gap is largest when your highest-rate debt also carries a large balance — for example a maxed-out credit card at 24% sitting alongside a small low-rate personal loan. In that case avalanche attacks the costly card immediately while snowball would clear the cheap loan first, letting the expensive interest pile up. When all your debts have similar rates, the two methods cost almost the same and the choice barely matters.
What is the downside of the avalanche method? ▾
The avalanche method's only weakness is psychological. If your highest-rate debt also has a large balance, it can take many months before you clear your first debt — and that lack of a visible win causes some people to lose momentum and give up. Avalanche is the cheapest plan only if you actually stick to it. If you know you need quick wins to stay motivated, the snowball method's faster first payoff may be worth its slightly higher interest cost.
Should I pay off my credit card or my car loan first with avalanche? ▾
With the avalanche method you pay whichever debt has the higher APR first, regardless of balance. Credit cards typically charge 18–29% while car loans run far lower, often 5–9%, so the avalanche method almost always targets the credit card first. Enter both debts above and the calculator will order them by rate and show you the payoff plan — including how much interest you save versus clearing them in a different order.
Does the avalanche method affect my credit score? ▾
Paying down debt with any consistent method helps your credit score over time, mainly by lowering your credit utilization — the share of your available credit you are using. The avalanche method targets high-rate debt, which is usually credit-card debt, so it tends to reduce utilization quickly and that can lift your score sooner than other orders. Making every minimum payment on time, which this plan assumes, is itself the single biggest factor in a healthy score.