Debt Snowball Spreadsheet vs. App (Free Template)
A debt snowball spreadsheet is the classic way to start a payoff plan: one row per debt, a few formulas, and a clear picture of what you owe. Below is a free template that works in Google Sheets and Excel, a guide to every column, and an honest comparison with an app, because a spreadsheet is great on day one and gets harder to keep up by month six.
Free debt snowball template (Google Sheets / Excel)
Download the free template (CSV). It's a plain CSV file with formulas already in the cells, so it opens anywhere:
- Google Sheets: create a blank spreadsheet, then File → Import → Upload and pick the file. Keep the option that converts text to numbers, dates and formulas turned on, and the formulas will calculate.
- Excel: open the file directly. Excel reads the formulas and calculates them on open.
One tip: after you open it, save it as a Google Sheet or an .xlsx workbook. A CSV file stores values only, so if you save back to CSV, your formulas can be replaced by their results.
The template comes with five sample debts so you can see the formulas working before you type your own.
| Column | What it shows | How it's calculated |
|---|---|---|
| Debt | Name of the debt | You type it |
| Balance | What you owe today | You type it |
| APR % | Annual interest rate | You type it |
| Minimum payment | Required monthly payment | You type it |
| Interest this month | Roughly how much interest the debt adds this month | Balance times APR, divided by 1,200, rounded to cents |
| Months at minimum only | How long this debt lasts if you pay only the minimum | NPER(APR/1200, -payment, balance), rounded up; shows "never" if the minimum doesn't cover the interest |
| Snowball order | Payoff order by balance, smallest first | RANK of the balance, ascending |
| Avalanche order | Payoff order by rate, highest first | RANK of the APR, descending |
Under the debts there's a Total row that sums balances, minimums and this month's interest. Below that is a cell for Extra per month (set to $200 in the sample) and a Total monthly budget for debts cell that adds the extra to your total minimums.
How to fill it
Pull your latest statement for every debt, or log in to each lender's site, and copy four numbers per row: the name, the current balance, the APR and the minimum payment.
With the sample data, the template calculates this:
| Debt | Balance | APR | Minimum | Interest this month | Months at minimum | Snowball | Avalanche |
|---|---|---|---|---|---|---|---|
| Store card | $600 | 26.99% | $25 | $13.50 | 35 | 1 | 1 |
| Credit card | $2,400 | 22.99% | $72 | $45.98 | 54 | 3 | 2 |
| Medical bill | $900 | 0% | $50 | $0.00 | 18 | 2 | 5 |
| Personal loan | $5,500 | 13.5% | $190 | $61.88 | 36 | 4 | 3 |
| Car loan | $9,800 | 7.9% | $265 | $64.52 | 43 | 5 | 4 |
Totals: $19,200 owed, $602 in minimums, $185.88 in interest this month. With $200 extra, the monthly budget is $802.
A few things worth noticing in those numbers:
- Interest this month is the fastest reality check in the file. Here, $185.88 of the $602 in minimums goes to interest before any principal is repaid.
- Months at minimum only shows the slowest debt: at minimums alone, the credit card takes 54 months. Paying all five debts that way costs $4,393.87 in interest.
- Snowball vs avalanche order differ on the medical bill. The snowball puts it second because the balance is small; the avalanche puts it last because it charges 0%.
If you add rows, extend the ranges in the RANK formulas and the totals so they include the new lines. A range that stops one row short is an easy way for a sheet to go quietly wrong.
Where spreadsheets break
The template tells you the order. It doesn't tell you the date you'll be debt-free, and that's where a simple sheet turns into a complicated one.
- The rolling snowball is hard to model. To see month by month when each debt closes and where its payment goes next, you need a grid with one column per month and formulas that check which debt is the current target. It's doable, but it's the kind of formula people copy from a forum and never fully trust.
- Changes ripple. A new debt, a rate change after a 0% promo ends, a month where you pay less: each one means editing formulas, not just numbers.
- Payments are manual. Every month you update balances by hand from your statements, or the sheet drifts away from reality.
- No reminders. A spreadsheet doesn't tell you a payment is due on Friday.
- Formula errors are silent. A range that misses one row or a wrong sign in NPER still gives you a number. It's just the wrong number.
To give you a sense of what the rolling part adds: the same five debts with $200 extra, run month by month with the snowball, are paid off in 28 months with $2,473.18 in total interest. The avalanche takes 27 months and $2,368.40. The template can't produce those numbers without that extra grid.
What an app automates
The debt snowball calculator runs the month-by-month simulation for you: enter the rows from your sheet and you'll get a payoff date and total interest for both methods. The full DelDebt planner goes further and replaces the parts of the spreadsheet you'd otherwise maintain by hand:
- Payoff date and total interest for snowball, avalanche, blizzard, cash flow or your own order, recalculated the moment you change a number.
- Payment tracking: mark a payment as made and the plan updates, with a history, progress and a streak of months without a missed payment.
- Due dates, reminders and a calendar file (.ics) you can add to Google Calendar or Apple Calendar.
- Extra payment preview: see how much a lump sum saves before you send it.
- A check against your statements: compare the planner's interest with what your lender charged.
It's free, and you don't need an account; without signing in, your data is stored on your device. If you like to see the whole picture first, our debt payoff plan in 5 steps walks through building one from scratch.
Spreadsheets still win for some people, and that's fine. If you enjoy tinkering, want to model something unusual, or share finances with a partner who lives in Google Sheets, keep the template and use the calculator to sanity-check the date.
Import your list
DelDebt doesn't import CSV files. Moving a list over is still quick:
- Keep your spreadsheet open next to the planner.
- Add each debt with the same four fields: name, balance, APR and minimum payment. Add the due date too, so reminders work.
- Set your extra payment per month to the same number as your sheet's Extra cell.
It takes a minute or two per debt, so a typical list is done in a few minutes. For loans, there's a faster route: upload your lender's payment schedule or a statement as a screenshot, a photo or a PDF, and the fields fill in for you. Check the numbers, save, and your plan is ready.
Once everything is in, compare the planner's payoff date with the one you expected from your sheet. If they differ a lot, look for a missing row or a formula range that didn't include every debt.