Money Detective

Debt Payoff Calculator & Savings Spreadsheet

A real month-by-month payoff simulation, not a rough guess. See exactly when you'll be debt-free, and how much interest you'll actually pay.

Excel and Google Sheets · AUD format · No bank login required
The Debt Payoff & Savings Planner on a laptop
Works with Excel and Google Sheets Australian dollar format No bank connection required Instant digital access
The problem

Minimum payments feel endless, and it's hard to see the finish line.

You don't know your real payoff date

Minimum payments alone can take years longer than they need to.

Extra payments feel abstract

Putting an extra $50 toward debt each pay, but no way to see what difference it actually makes.

Snowball or avalanche? Hard to tell

Both strategies get recommended, but without real numbers it's impossible to know which suits you.

How it works

A real simulation, not a guess.

1

List your debts

Balance, interest rate, and minimum payment for each one.

2

Pick your strategy

Snowball (smallest balance first) or Avalanche (highest interest first).

3

See your real payoff date

A month-by-month simulation shows exactly when you're debt-free, and what it costs in interest.

Take a look inside

See exactly what you're getting.

The Read Me tab of the Debt Payoff Planner, showing the three steps to get started
Start here

Three steps and you have your date

Pick snowball or avalanche, list your debts, then open the Dashboard. Nothing else to set up.

The Debts tab, where you list each debt with its balance, interest rate and minimum payment
Debts

Every debt, automatically prioritised

List the balance, rate and minimum payment for each debt. The planner works out which to clear first based on your chosen strategy.

The Debt-Free Dashboard showing debt today, debt-free date, months to go and total interest
Dashboard

Your debt-free date at a glance

Months to go, total interest and which debt your extra payment should go to, all calculated month by month from your own numbers.

The Your Plan tab listing each debt in payoff order with the month it is cleared
Your Plan

The order to clear them, and when each one disappears

See which debt is cleared first, what each one costs in interest, and the month it is gone.

The Compare Strategies tab comparing avalanche, snowball and minimum payments only
Compare

Avalanche, snowball or minimums only

Same debts, same extra payment. See what each approach costs in interest and how many months it saves.

An example

$33,890 across 5 debts, $350 extra a month

29
Months to debt-free
$5,149
Total interest paid
Calculated by the planner from the five example debts shown above (credit cards, a store card, a personal loan and a car loan), using the Avalanche method. Your numbers will depend on your own debts.
Who it's for

Designed for people who...

This is for you if you:

  • Have more than one debt and aren't sure what order to tackle them
  • Want to know your actual debt-free date, not a guess
  • Are deciding between snowball and avalanche
  • Prefer Excel or Google Sheets
  • Don't want to connect your bank account

This isn't for you if you want:

  • A live bank-syncing app
  • Debt consolidation or refinancing advice
  • Personalised financial advice

Built from real budgeting frustrations

This planner exists because minimum payments alone can feel like they'll never end, and generic advice about snowball vs avalanche doesn't tell you your actual numbers. This shows you exactly what your own numbers do.

Pricing

One simple price. No subscription.

Debt Payoff & Savings Planner

$12.95
introductory one-time price
  • Files that work in Microsoft Excel and Google Sheets
  • Snowball or Avalanche method, your choice
  • Freed-up minimum payments automatically roll to the next debt
  • Total interest calculated exactly, not estimated
  • Visual payoff curve chart
  • Bank statement import (CSV or PDF)

After payment, you'll receive immediate access to the downloadable file and setup instructions.
By completing this purchase, you agree to the Terms and Conditions and acknowledge the Privacy Policy.
FAQ

Questions before you buy

Is this an Excel file?

Yes. It works in Microsoft Excel and Google Sheets.

Does it connect to my bank?

No. You enter your debts yourself, balance, rate, minimum payment.

Does it recommend consolidating or refinancing?

No. This is purely a payoff planning tool, it doesn't recommend any specific financial product.

What's the difference between Snowball and Avalanche?

Snowball pays off the smallest balance first for quick wins. Avalanche pays off the highest interest rate first, which saves the most money. You choose which one to use.

Is this financial advice?

No. This is an educational planning tool, not personalised financial advice.

What happens after I purchase?

You get immediate access to the downloadable file and a short setup guide.

See your actual debt-free date.

A real month-by-month simulation, not a rough guess.

Get the Planner →