Reach
guide · debt payoff strategy
Debt snowball vs avalanche: which should you pick?
Two payoff methods, one real question: are you optimizing for interest saved, or for actually finishing? Here's how each works, a worked example, and an honest rule for choosing.
The shared foundation
Both methods start from the same base: pay the minimum on every debt so nothing goes delinquent, then aim all of your extra money at exactly one target debt. When that debt dies, its entire payment, minimum plus extra, rolls into the next target. The rolling payment is why both methods accelerate over time. The only difference between them is how you order the targets.
Debt snowball: smallest balance first
Order your debts from smallest balance to largest, ignoring interest rates. Attack the smallest first.
The logic is behavioral, not mathematical. Paying off an entire debt (closing the account, deleting the row) is a win you can feel, and it arrives fast when the first target is small. Behavioral research on consumer debt has repeatedly found the same pattern: people who concentrate payments and clear individual accounts early are more likely to stay with a payoff plan than people who spread payments thin. Momentum is a feature, and the snowball manufactures it on purpose.
The cost: if your largest debt also carries your highest rate, it sits at the back of the queue accruing expensive interest while you clear the small stuff.
Debt avalanche: highest rate first
Order your debts from highest interest rate to lowest, ignoring balances. Attack the most expensive first.
This is the mathematically optimal order. Every dollar of extra payment goes where it neutralizes the most interest, so the avalanche can never cost more in total interest than the snowball, and the gap grows with the spread between your rates and the size of your balances. A large balance at 27% APR is a fire; avalanche points the hose at the fire first.
The cost: if your highest-rate debt is also your biggest, your first "win" might be two years away. No closed accounts, no visible milestones, just a slowly shrinking number, and that's where plans quietly die.
A worked example
Say you owe three debts and have $250/month extra beyond the minimums:
| Debt | Balance | APR | Snowball order | Avalanche order |
|---|---|---|---|---|
| Store card | $1,800 | 26.9% | 1st (smallest) | 1st (highest rate) |
| Personal loan | $3,200 | 11.0% | 2nd | 3rd |
| Credit card | $6,500 | 22.0% | 3rd | 2nd |
Notice the first target is the same either way: small, high-rate debts like store cards are often both the smallest balance and the highest APR. The methods diverge at debt two. Snowball clears the $3,200 personal loan next: another closed account within months, more momentum. Avalanche goes after the $6,500 credit card at 22% instead: fewer visible wins for a while, less total interest paid.
That's the entire trade, in one row of a table: a second quick win vs a cheaper total journey.
How to actually choose
- Rates within a few points of each other? The math barely cares. Take the snowball's motivation for free.
- One debt's rate towers over the rest (a 27% card next to a 6% loan)? Avalanche. The interest gap is real money.
- You've started and quit payoff plans before? Snowball. Your history is telling you follow-through is the binding constraint, not interest.
- Want both? The hybrid: clear one small debt first for the quick win, then switch to avalanche ordering. This is what many planners quietly recommend.
The best method is the one you'll still be running in month eighteen. A snowball plan you follow beats an avalanche plan you abandon, and an avalanche plan you follow beats both.
Four mistakes that sink either method
- Spreading extra payments across every debt. It feels fair and diligent; it kills the acceleration both methods depend on. One target at a time.
- No buffer. Without a small emergency cushion, the first surprise bill lands on a credit card and undoes a month of progress.
- Paying down while still overspending. A payoff plan sitting on top of an unwatched budget is a bathtub draining with the tap on. Track the spending too.
- No visible finish line. A projected debt-free date turns an abstract slog into a countdown. Recalculate it when you make an extra payment; watching the date move closer is the avalanche's answer to the snowball's momentum.
Common questions
Which method saves more money?
Avalanche. It can never cost more in total interest than snowball, and the gap grows the wider the spread between your rates and the larger your balances. But the cheaper method on paper only wins if you stick with it.
Should I pay off debt or build savings first?
A common approach: a small emergency buffer first, often $500 to $1,000, so a surprise doesn't land on a credit card, then extra payments toward debt, then a fuller emergency fund once high-rate debt is gone. High-rate debt usually costs more than savings earn, which is why it takes priority.
Do snowball and avalanche ever pick the same debt?
Often, yes. Small, high-rate debts like store cards are frequently both the smallest balance and the highest APR, so both methods start in the same place. They only diverge when balance order and rate order disagree.
Where Reach fits
Reach runs either method for you. Put every debt on one screen, choose smallest-first (snowball) or highest-rate (avalanche), and Reach flags the one debt to focus on next and projects your debt-free date, the countdown that keeps the plan alive. Payments take seconds to log, and the same ledger drives your budget and cashflow forecast, so the "still overspending" mistake gets caught too. See how it compares to YNAB, Monarch and Copilot or start with tracking expenses in three seconds.
Point everything at one debt.
Snowball or avalanche, one flagged focus debt, and a debt-free date that moves closer with every payment. Free to download.