Avalanche or snowball — which is actually better?

Avalanche (highest APR first) is mathematically optimal and always minimizes total interest. Snowball (smallest balance first) typically costs modestly more but produces quicker paid-off accounts, which research on debt behavior suggests helps many people persist. The best method is whichever one you'll actually stick with.

Should I pay only minimums on everything else?

Yes — the strategy is minimums on every debt, then all remaining budget to the single target debt. When the target is cleared, its payment cascades to the next target. Splitting extra money evenly across debts feels fair but pays off the expensive debt slower.

When does a balance transfer or consolidation loan beat raw payoff?

When the math clears the fees: a 0% intro card typically charges a 3-5% transfer fee, and consolidation loans carry their own APR and sometimes an origination fee. On high-APR card debt you can eliminate within a 15-21 month promo window, a transfer usually wins — run the numbers in our balance transfer calculator.

Should I stop investing while paying off card debt?

At 20%+ card APRs, paying the debt is a guaranteed return no market reliably beats — most planners pause extra investing except an employer 401(k) match, which is an instant 50-100% return and worth keeping.

Will paying off cards raise my credit score?

Usually, and often quickly: credit utilization (balances ÷ limits) is a major scoring factor and updates as your reported balances drop. Keep the paid-off cards open — closing them shrinks your available credit and can push utilization back up.

Tools · Money Basics

Money Basics · loans & debt

Debt payoff calculator

Avalanche vs. snowball, simulated month-by-month with the full cascade. Plug in your real debts and see which strategy actually pays off — and what every extra dollar saves you.

Your debts

3 debts · $42,100

Balance
$
APR
%
Min/mo
$
Balance
$
APR
%
Min/mo
$
Balance
$
APR
%
Min/mo
$

Extra payment per month$200

On top of the $705/mo minimums — this is the lever that actually moves the payoff date.

How to read thisAvalanche always costs less in total interest — math guarantees it. Snowball can still win if the morale boost of clearing a small debt first keeps you on plan. Pick the one you'll finish.

Lowest total interest

Avalanche

Pay highest APR first. Lowest total interest.

Debt-free in

6y 6m

78 months total

Total interest

$8,751

Lifetime cost

Snowball

Smallest balance first. Fastest early wins.

Debt-free in

6y 6m

78 months total

Total interest

$8,751

Lifetime cost

Head-to-head

Both strategies finish in the same month

Total payoff: $50,851 (principal + interest, best case)

Personalized recommendation

$6,400 in credit card debt — a 0% balance transfer could pause interest for 12–21 months

The right balance-transfer card gives you a runway to pay down principal without interest piling up. Combined with avalanche, this is the fastest path to debt-free on this profile.

Compare balance-transfer cards

Total debt over time

AvalancheSnowball

Chart refreshes as you change debts or extra payment.

Lower curve = debt clears sooner at that point in time.

Show the mathExpand →

We step through every month: accrue interest, apply each debt's minimum, then throw your extra payment at the target debt (highest APR for avalanche, smallest balance for snowball). When a debt clears, the payment rolls onto the next one — the classic "snowball" cascade.

interest_month = balance · (APR / 12)
balance ← balance + interest − payment

Assumes rates are fixed, payments are on-time, no new charges on credit cards, and no windfalls. In the real world, extra cash and refinancing offers move the numbers further in your favor.

Quick answer

How fast can you clear $8,000 of credit card debt?

Paying $300 a month on an $8,000 balance at 22% APR takes 37 months and costs about $3,083 in interest. Raise the payment to $500 and you're done in 20 months with about $1,556 of interest — $1,527 saved. With multiple debts, the avalanche order (highest APR first) always minimizes total interest; the snowball order (smallest balance first) trades some interest for faster psychological wins.

37 mo · $3,083 interest

At $300/mo

20 mo · $1,556 interest

At $500/mo

$1,527

Interest saved

22%

APR modeled

Frequently asked questions

How we built this tool

How this calculator runs the math

Step 1

Full month-by-month simulation

We accrue interest monthly, apply every minimum, throw extras at the target debt, and cascade rolled-off payments onto the next one — the classic snowball effect, mathematically.

Step 2

Avalanche vs. snowball, same inputs

Both strategies run against identical debts and identical extra payment. The only difference is which debt gets the extra cash first.

Step 3

Finish-what-you-start matters

Avalanche always wins on paper. But if snowball's early-win dopamine is what keeps you on plan, that's the right answer — this calculator won't shame either pick.

Paying 20%+ APR on the cards you just entered? A consolidation loan may shorten the payoff.

If your credit score is 660 or higher, a fixed-rate consolidation loan typically prices well below the ~21% average card APR — one payment, one payoff date, and this same calculator math working for you instead of against you. Checking offers is a soft pull.

See my loan offers

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Debt payoff calculator

How fast can you clear $8,000 of credit card debt?

Frequently asked questions

Avalanche or snowball — which is actually better?

Should I pay only minimums on everything else?

When does a balance transfer or consolidation loan beat raw payoff?

Should I stop investing while paying off card debt?

Will paying off cards raise my credit score?

How this calculator runs the math

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