PocketProofYou don't have to pick between an emergency fund and paying off debt faster — you need a small fund first, then a split that depends on your actual interest rate, not a rule of thumb that ignores it.
The order that actually works
- Always cover every debt minimum. Non-negotiable, regardless of what else is happening.
- Build a $500–$1,000 starter emergency fund before anything else extra. Without this, the next flat tire or ER copay becomes new debt — undoing whatever progress the extra payments made.
- Once the starter fund exists, split what's left between debt and continued saving — and the right split depends on your interest rate, which the calculator below works out for you.
This mirrors the staged approach in our emergency fund guide — Stage 1 there is exactly this same $500–$1,000 starter target, for exactly this same reason.
Split calculator: emergency fund vs. debt payoff
Enter your numbers below. If your fund is still under the starter target, everything extra goes there first — the calculator shows you exactly how many months that takes. Once it's funded, it splits your extra money based on your debt's interest rate.
Where should your extra money go?
Defaults match the example below.
Case study: Jamal's $150/month
Jamal has $150/month extra, no emergency fund yet, and a $3,000 credit card balance at 22% APR beyond his minimum payment.
Months 1–7: All $150/month goes to the starter fund. $1,000 ÷ $150 = 6.7, so he crosses the $1,000 mark in month 7 ($1,050 banked) — debt gets minimums only during this stretch, on purpose.
Month 8 onward: With the starter fund in place and a 22% APR — well above the 8% threshold where interest cost dominates — the split shifts to 80% debt / 20% fund: $120/month toward the card, $30/month continuing to build savings.
| Debt APR | To debt | To fund | Why |
|---|---|---|---|
| 8%+ (most credit cards) | 80% — $120 | 20% — $30 | Interest cost outpaces what a savings account earns — prioritize killing it |
| 4–8% (some personal/auto loans) | 50% — $75 | 50% — $75 | Cost and the need for liquidity are roughly balanced |
| Under 4% (some subsidized student loans) | 20% — $30 | 80% — $120 | The debt is cheap — building savings and other goals matter more |
If you're deciding which specific debt to target with your share, our debt snowball vs. avalanche comparison covers that choice directly — this split calculator decides how much goes to debt overall, that post decides which debt it goes to first.
And if the APR itself is what's pushing your split toward "mostly debt," a lower rate changes the math — see our credit card APR negotiation script for a 15-minute call that can shift which band you fall into.
