Plan a 2027 new-year savings challenge: classic $1-to-$52, reverse, or bigger steps. See the total, every milestone date from Monday 4 January 2027 and the interest it earns.
By TanLabs · Formulas cross-checked against the free spreadsheet · Updated 2026-10-31 · Runs in your browser – nothing you type is sent anywhere
With first week deposit $1, increase each week $1, weeks 52, order: smallest first (classic), savings APY 4% per year:
Total saved: $1,378 in 52 weeks
Biggest deposit $52 · average $27/week (about $115/month) · interest at 4% APY ≈ $18
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Deposit in week k = first deposit + step × (k − 1) (reverse: step × (n − k)). Total = n × first + step × n(n − 1) ÷ 2. Interest compounds weekly at APY ÷ 52.
All start on Monday 4 January 2027 and run for 52 weeks:
| Challenge | Biggest week | Total in 2027 | Per month (avg) | Interest at 4% APY |
|---|---|---|---|---|
| Classic $1 → $52 | $52 | $1,378 | $115 | $18.19 |
| Reverse $52 → $1 | $52 | $1,378 | $115 | $36.57 |
| $2 steps | $104 | $2,756 | $230 | $36.39 |
| $5 steps | $260 | $6,890 | $574 | $90.97 |
| $10 steps | $520 | $13,780 | $1,148 | $181.95 |
The reverse challenge saves the same $1,378 but earns about twice the interest because the big deposits arrive early. $5 steps reach $6,890, close to a starter emergency fund.
$1,378 with $1 steps. With $5 steps it is $6,890, and with $10 steps $13,780.
Any week works. This calculator dates week 1 as Monday 4 January 2027, the first Monday of the year, and week 52 as 27 December 2027.
It front-loads the big deposits into January, when motivation is high, and leaves tiny ones for the expensive holiday weeks. It also earns about twice the interest.
Yes. Saving the average, about $115 a month for the classic challenge, reaches the same $1,378.
Deposits at FDIC-insured banks are covered up to $250,000 per depositor, per bank, per ownership category.
Next year's Christmas gifts, a starter emergency fund or a holiday trip. Run the savings goal calculator for bigger targets.
Sources: FDIC – deposit insurance · America Saves – savings tips