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Enter all your debts with balances, interest rates, and minimum payments. Add any extra monthly payment you can afford, and this calculator compares two popular payoff strategies: avalanche (highest APR first) and snowball (smallest balance first). See your debt-free date, total interest paid, and the optimal payoff order.
Avalanche Interest
$6,909.06
Snowball Interest
$6,909.06
Interest Saved
$0
Payoff Time Gap
0 months
With $48,000 across credit card, auto, and student debt and an extra $300/month, avalanche pays about $0 less interest than snowball in this scenario. Estimated payoff time is 4y 1m for avalanche vs 4y 1m for snowball.
Source: FinCalc server-rendered example using the same formulas as the interactive calculator.
With $300 extra per month, the avalanche strategy pays off these debts in 4 years 1 months and can save $0 in interest.
Debt-Free In
4y 1m
Total Interest
$6,909.06
Total Paid
$54,909.06
Interest Saved (Avalanche)
$0
FinCalc AI
FinCalc AI
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Direct answer: with $48,000 total debt, weighted APR around 9-10%, and $300 extra payment, avalanche often saves roughly $1,500-$4,000 versus snowball, while payoff timelines are frequently within 0-6 months of each other.
| Strategy | Typical Interest Cost | Typical Payoff Time | Best Use Case |
|---|---|---|---|
| Avalanche | Lower | Equal or slightly faster | Optimize total cost |
| Snowball | Higher | Equal or slightly slower | Boost motivation |
Source context: Federal Reserve household debt data and CFPB debt guidance consistently show that interest rate is the strongest driver of total borrowing cost.
The debt avalanche method targets the debt with the highest interest rate first. Once that debt is paid off, its minimum payment is freed up and added to the next highest-rate debt. This approach minimizes total interest paid and is mathematically optimal. The debt snowball method targets the smallest balance first, giving you quicker psychological wins that help maintain motivation.
Avalanche is mathematically optimal, but snowball may be better if:
Your extra monthly payment is applied on top of all minimum payments. As each debt is eliminated, its minimum payment is "freed up" and cascades to the next debt in line. This snowball effect accelerates payoff dramatically — even a modest extra $200/month can save thousands in interest and cut years off your debt-free date.
With $48,000 in total debt across three accounts (credit card at 22.99%, car loan at 6.5%, student loan at 5%) and $300/month extra, the avalanche method typically saves $1,000–3,000 more in interest compared to snowball, though both strategies dramatically outperform making only minimum payments.
With $30,000 spread across cards and loans, avalanche usually saves more interest because it targets the highest APR first. In many scenarios, interest savings are around $1,000 to $3,000 compared with snowball when monthly payment is the same. Snowball can still be useful if fast early wins improve consistency.
For a $40,000 debt stack near a 10% blended APR, adding $300 per month can shorten payoff by about 3 to 5 years. It can also cut total interest by roughly $8,000 to $15,000. Exact results depend on minimum payments, APRs, and payoff strategy.
At 22% APR with a fixed $300 monthly payment, $10,000 is paid off in about 47 months. Total interest paid is roughly $4,000 over that period. Increasing payment to $400 can cut the timeline to about 32 months and reduce interest by around $1,600.
Debt consolidation saves money only if the new APR and fees are lower than your current weighted cost. For example, moving $20,000 from 19% to 10% APR can reduce annual interest from about $3,800 to $2,000 before fees. If origination fees are 5%, that is a $1,000 upfront cost you must offset with rate savings.
Use snowball if psychological wins matter more than marginal interest savings. If quitting feels likely with avalanche (no visible progress for months), snowball can improve adherence. The interest gap is often $1,000–$4,000 on $30K–$50K debt — if snowball keeps you paying consistently, it can be worth it.
If your debt APR is higher than expected after-tax investment returns (e.g. 20% credit card vs 7% market), pay debt first. High-interest debt is a guaranteed loss. For low-rate debt (e.g. 4% student loan), investing may yield more long term, but eliminating debt reduces risk and frees cash flow.
No. Paying off debt typically improves your credit utilization and payment history, which can raise your score. Closing an account may cause a brief dip, but being debt-free and having lower utilization usually benefits your score over time.
Enter each debt (balance, APR, minimum payment) and your extra monthly payment in this calculator. It runs month-by-month until all balances reach zero and shows your debt-free date for both avalanche and snowball. Adjust the extra payment to see how it changes.
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