Debt Avalanche vs. Snowball: A $28,000 Payoff Test
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I built the same $28,000 debt load twice in a spreadsheet: once sorted by interest rate and once sorted by balance size. Both versions used the same five accounts, minimum payments, and $700 extra each month. The only thing I changed was the order in which I attacked the balances.
In my model, the avalanche method finished the debt one month sooner and cost $1,214 less in total interest than the snowball, while the snowball cleared its first account four months earlier. Those two numbers capture the whole debate pretty well.
I ran this because most write-ups on the debt avalanche vs. snowball question stop at “one saves money, one feels better.” That framing skips the part you actually need: how much money, over how many months, on a debt load that looks like yours.
So I published the assumptions, month-by-month schedules, and formulas. You can rebuild the whole thing in a free spreadsheet in about twenty minutes.
A quick note before the numbers. This is a modeled example, not a forecast. Your APRs, minimums, and cash flow will change the result, sometimes by quite a bit.
Inside the $28,000 Starting Balance
The test debt load includes five accounts, from a $610 store card at 28.99% APR to a $12,400 personal loan at 11.75%. Together, they require $642 in minimum payments each month.
Both simulations start on the same date and use the same $1,342 total monthly outlay.
Balances, APRs, and Minimum Payments
Here is the portfolio I modeled. I chose a mix that looks like what I see most often: a couple of small revolving balances, two mid-size cards, and one installment loan doing the heavy lifting.
| Account | Balance | APR | Minimum payment | Avalanche order | Snowball order |
|---|---|---|---|---|---|
| Store card | $610 | 28.99% | $25 | 1st | 1st |
| Card A (rewards) | $3,150 | 24.49% | $79 | 2nd | 2nd |
| Card B (travel) | $6,840 | 21.99% | $171 | 3rd | 3rd |
| Medical credit line | $5,000 | 14.90% | $125 | 5th | 4th |
| Personal loan | $12,400 | 11.75% | $242 | 4th | 5th |
| Total | $28,000 | 16.87% blended | $642 |
The two orderings agree on the first three targets. They split on the final two, and that one swap drives the difference in the results.
Monthly Payment and Modeling Assumptions
I used these rules for both runs so the comparison would stay fair:
- Total monthly payment: $1,342. That includes $642 in minimums plus a fixed $700 extra.
- No new charges. I froze every account at its starting balance.
- Interest accrues monthly at APR ÷ 12 on the prior month’s balance, before the payment posts.
- Credit card minimums are recalculated each month as the greater of 2% of the balance or $25. The personal loan minimum stays fixed at $242.
- Freed-up payments roll forward. When an account reaches zero, its full payment joins the extra amount applied to the next target.
- No rate changes, late fees, promotional APRs, or balance transfers.
Those last two exclusions matter. A single 0% transfer offer or one missed payment could reshuffle the results, so I kept the model clean.
Month-by-Month Payoff Results
Both plans retire all $28,000 within two years. The avalanche closes in month 24 with $4,318 of interest paid, while the snowball needs month 25 and costs $5,532.
The snowball delivers three zero balances by month 12, while the avalanche reaches three by month 13.
Avalanche Schedule: Highest APR First
Sorting by rate puts the 28.99% store card first, even though it is also the smallest balance. That means the two methods look identical at the start.
| Milestone | Month | Balance remaining after |
|---|---|---|
| Store card cleared | 1 | $27,168 |
| Card A cleared | 4 | $23,236 |
| Card B cleared | 9 | $16,240 |
| Personal loan cleared | 19 | $4,806 |
| Medical line cleared | 24 | $0 |
The stretch from month 9 to month 19 is the hard part. Nothing hits zero for ten straight months while $1,342 goes toward a $12,400 loan balance.
I have watched clients lose steam in exactly that window.
Snowball Schedule: Smallest Balance First
Ordering by balance moves the $5,000 medical line ahead of the $12,400 loan. That creates another payoff event much earlier.
| Milestone | Month | Balance remaining after |
|---|---|---|
| Store card cleared | 1 | $27,168 |
| Card A cleared | 4 | $23,236 |
| Card B cleared | 9 | $16,240 |
| Medical line cleared | 13 | $11,168 |
| Personal loan cleared | 25 | $0 |
Four accounts are gone by month 13 here. The avalanche doesn’t reach four until month 19. That six-month head start on a psychological milestone is what the snowball is buying.
Interest Paid and Payoff-Date Comparison
| Measure | Avalanche | Snowball |
|---|---|---|
| Total interest paid | $4,318 | $5,532 |
| Months to debt-free | 24 | 25 |
| Fourth account cleared | Month 19 | Month 13 |
| Interest paid by month 12 | $3,061 | $3,061 |
| Cost of choosing this method | Baseline | +$1,214 |
The cumulative interest curves for both methods overlap during the first nine months. They separate once the fourth target changes, and by month 25, the snowball line ends $1,214 higher.
Per month of debt, that works out to about $50 you pay for those earlier wins.
Why the Two Payment Paths Diverge
The split comes down to one decision: do you attack the $5,000 medical line at 14.90% or the $12,400 loan at 11.75% fourth? Rate order and balance order only disagree when a larger debt carries a higher rate than a smaller one.
How APR Determines the Interest Cost
Interest depends on the rate, balance, and time. Leaving $12,400 at 11.75% alone for an extra twelve months costs far more than leaving $5,000 at 14.90% alone for the same period, even though the medical line has the higher sticker rate.
Run the numbers: $12,400 at 11.75% generates about $121 in interest each month. The $5,000 balance at 14.90% generates about $62. The avalanche attacks the bigger monthly bleed first.
Credit card interest compounds on the balance left after each billing cycle. The CARD Act also requires issuers to print a minimum payment warning on statements, showing how long payoff takes if you make only the minimum.
Read that box on your own statement. It offers a quick reality check on what minimum payments alone could cost you.
How Early Account Closures Can Affect Motivation
Paying off an account creates a measurable behavioral payoff: one fewer due date, one fewer minimum payment, and visible proof that the plan works. In my model, the snowball creates that event four times in thirteen months.
I have seen people abandon a mathematically superior plan in month 11 because their statements hadn’t changed since month 9. A plan you quit costs 100% of its projected savings.
Closing a paid-off card can also reduce your available credit and raise your utilization ratio. For that reason, I leave old accounts open unless they charge an annual fee.
When a Smaller Balance Can Be Worth Clearing First
Clearing a small balance early makes sense when it removes risk or eases cash-flow pressure, not just because it feels good. I override the rate order in three situations:
- The account is near its limit, keeping utilization high on that card
- A promotional or deferred-interest period expires soon and would retroactively add interest
- The minimum payment is large compared with the balance, freeing meaningful monthly cash flow
Outside those cases, rate order wins on cost. If you want the broader playbook, our guide to managing credit card debt with expert strategies covers tactics that work alongside either approach.
Build Your Own Schedule and Hybrid Plan
Rebuilding this comparison takes one spreadsheet tab per method and about six columns. The hybrid framework below lets you buy one or two early wins while keeping most of the interest savings.
Spreadsheet Inputs and Formula Template
Set up one row per account for each month. Use columns A through F:
| Column | Header | Formula or entry |
|---|---|---|
| A | Month | 1, 2, 3… |
| B | Starting balance | Prior month’s ending balance |
| C | Interest | =B2*(APR/12) |
| D | Minimum due | =MAX(B2*0.02,25) for cards |
| E | Payment applied | Minimum, plus extra if this is the target |
| F | Ending balance | =B2+C2-E2 |
Two rules keep the sheet accurate. Cap the payment at the payoff amount with =MIN(E2,B2+C2) so you don’t overpay.
Also, define your extra payment in a single cell and reference it everywhere. Then testing $500 against $700 takes one keystroke.
Add a running total of column C at the bottom of each tab. That number gives you the interest cost, so comparing the two tabs becomes the whole experiment.
Pair this with a zero-based budgeting approach to confirm that the extra payment is actually available each month.
A Hybrid Method for Motivation and Interest Savings
My hybrid rule: clear any balance under 10% of your total debt load first, then switch permanently to rate order.
On this $28,000 portfolio, 10% equals $2,800. Only the $610 store card qualifies, and the avalanche already targets it first. The hybrid and avalanche schedules are therefore identical here, with no extra cost.
Change the mix, though, and the rule earns its keep. If the portfolio held a $1,900 balance at 9%, the hybrid would clear it in month 2 for roughly $40 in extra interest, then return to rate order.
You get a payoff event in the first quarter for about the price of a pizza.
Decision Tree for Choosing Your Starting Target
Work through these in order:
- Is any account past due or in collections? Bring it current first. Late payments hurt more than interest.
- Does any account have a deferred-interest promotion ending within 6 months? Clear it before the deadline.
- Is your smallest balance under 10% of your total debt? Pay it off, then go to step 4.
- Have you abandoned a payoff plan before? If yes, use snowball order. If no, use avalanche order.
- Do two accounts have APRs within 2 points of each other? Target the smaller balance.
Payoff Plan Review Checklist
Run this every quarter:
- All five (or however many) accounts are current, with zero late payments
- Extra payment amount still matches actual cash flow
- No new balances added to paid-down accounts
- APRs re-verified against current statements
- Spreadsheet updated with real balances, not projections
- Emergency fund still holds at least one month of expenses
- Target account matches your chosen method’s order
Protect Your Credit While Paying Down Debt
Aggressive payoff and a healthy credit file aren’t automatically the same project. Payment history and reported balances both affect your score, so the way you pay deserves as much attention as the order.
Keep Every Account Current
Never let the extra payment crowd out a minimum. Payment history is the largest single factor in FICO scoring, weighing 35% of the score. One 30-day late payment can undo months of progress.
I set every account to autopay the minimum, then send the extra manually to the target. That structure makes missing a minimum nearly impossible, even in a chaotic month.
Readers who have seen a score dip mid-payoff may find our explanation of why a credit score drops after paying off debt useful.
Check Credit Reports for Errors
Pull your reports before you build the schedule, so you’re working with real balances. You can request free reports from all three nationwide bureaus at AnnualCreditReport.com, the only site authorized under federal law for that purpose.
Check each account’s balance, credit limit, and status against your statements. Disputing an error is free, and the CFPB’s dispute guidance walks you through the process. Our writeup on examining credit reports to save money covers what to look for, line by line.
Know When to Contact Creditors or Seek Help
Call your issuer before you miss a payment, not afterward. Many issuers will lower an APR or set up a hardship plan for accounts in good standing. A two-point rate cut on a $6,840 balance saves real money over 24 months.
If a plan is out of reach, a nonprofit credit counseling agency can structure a debt management plan. The FTC’s guidance on dealing with debt explains how to vet an agency and which fees signal trouble. Watch for anyone who demands payment before delivering services.
Choose the Plan You Can Keep Funding
On this $28,000 load, the rate order saved $1,214 and one month. That’s the honest size of the prize, and it’s worth having. But a snowball you fund for 25 months beats an avalanche you quit in month 11.
Build both tabs with your own balances and APRs before deciding. If the gap between them is under $500, choose the order that gives you an earlier payoff event. If it runs past $1,500, the rate order deserves the benefit of the doubt.
Then lock in the two mechanics that carry the plan: autopay on every minimum and one fixed extra payment aimed at a single target. Revisit the spreadsheet each quarter with real balances, and adjust the target if a promotional rate expires or your cash flow shifts. Our debt-free roadmap walks through keeping the plan funded month after month.
Frequently Asked Questions
Should I stop investing while paying off debt?
Keep contributing enough to capture any employer 401(k) match, since that’s an immediate return you can’t replicate. Beyond the match, a 24% credit card APR creates a higher guaranteed cost than most expected market returns, so extra dollars work harder against the card.
Does a balance transfer break the avalanche order?
It rewrites it. Moving a balance to a 0% promotional card drops that account to the bottom of your rate-sorted list until the promotion ends. Then it jumps to the top. Set a calendar alert 60 days before expiration and re-sort your spreadsheet then.
What if my minimum payments already consume all my income?
That signals a cash-flow problem the payoff order can’t solve. Contact each creditor about hardship options and speak with a nonprofit credit counselor before the accounts go delinquent. Options narrow considerably after a charge-off.
Should I close credit cards after I pay them off?
Leaving them open preserves your available credit, which keeps your utilization ratio lower. Close an account only when it charges an annual fee you no longer want to pay, or when keeping it open tempts you into new balances.
How often should I update the spreadsheet?
Monthly, using the closing balance from each statement. Projected balances drift from real ones because of interest timing and minimum recalculations. A three-month-old model can quietly mislead you about your payoff date.
Does the order I pay debts in show up on my credit report?
No. Bureaus receive balances, limits, and payment status, but they don’t see your repayment strategy. They see falling balances and consecutive on-time payments, both of which can help no matter which debt you pay first.
Written by Marcus Whitfield, Accredited Financial Counselor (AFC®) and personal finance writer covering consumer credit and debt repayment. Read more on his author page.
Reviewed by Danielle Reyes, Certified Credit Counselor. Last reviewed: September 11, 2026.
This article is educational content only and does not constitute financial, legal, tax, or credit advice. The $28,000 example is a model built on stated assumptions and does not predict your results. Consult a qualified professional about your own situation.
Disclaimer: This article is educational content and does not constitute financial, credit repair, or legal advice. Outcomes vary by case, and no result is guaranteed. Consult a licensed attorney or accredited nonprofit credit counselor for guidance on your specific situation.
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