Harbor

Free calculators

See where your money goes — then make a plan.

Free calculators for debt payoff, paycheck budgeting, and cash flow. Full Excel and Google Sheets templates are paid — or grab the bundle.

“I finally saw leftover after bills, not after a monthly guess.” Maya R. — Paycheck Budget

Left after bills

$804.00

This bi-weekly paycheck

Left after the plan

$199.00

Bills + categories

Debt-free

September 2031

Snowball · $200 extra · $4,591 interest

How it works

01

Enter a few numbers

Sample data is already filled in. Swap it for yours — or just poke around.

02

See the plan

Dates, leftover, and the months that would go red. Built to read in a glance.

03

Keep going

Email the snapshot (optional), buy the spreadsheet if you want the file, or unlock Pro in the browser.

Reviews

What people say after they run the numbers.

Specific leftover. A debt-free date they can live with. A red month they still had time to fix.

I finally saw leftover after bills, not after a monthly guess. $199 isn’t a lot — but it’s a number I can actually keep.

Maya R.

Nurse, bi-weekly pay·Paycheck Budget

Snowball vs Avalanche on the same debts. I picked the date I could live with, then bought the spreadsheet so I could log the extra $200.

Jordan P.

Paying off six debts·Debt Payoff

The cash flow chart showed a red month I would have walked into. I moved a client invoice up two weeks. That was the whole product, for me.

Priya S.

Freelance designer·Cash Flow

Read all reviews and leave yours →

Want the version you keep using every month?

Same math as the calculators. Logs, due dates, and the tabs a one-screen tool can’t hold. $14 each, or all three for $29.

Debt Payoff Tracker & Schedule

Snowball or Avalanche for up to eight debts, a 120-month schedule, payment log, and a side-by-side comparison.

Paycheck Budget + Bill Tracker

Budget by paycheck. Recurring bills, category actuals, a transaction log, and leftover after bills and after the plan.

Cash Flow Forecast Spreadsheet

Monthly running balance, one-time hits, and a 12-month chart. The keep-using version of the free forecast.

Harbor Pro — $19 once

Save named plans, export reports, compare Snowball vs Avalanche. Still no subscription.

See what’s included