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Starting a business / Running a business

I need a formula for my spreadsheet.

Find a function, understand its arguments, and adapt an example to your own cells.

A useful first step

Formula Lab + Cheat Sheet

Explore the $3 combined Lab and Cheat Sheet, then follow a paid-invoice example from question to checked result.

Open Formula Lab + Cheat Sheet

$3 one-time purchase. Offline HTML Lab + printable PDF + opening guide.

Already partway through?

Begin at the point that matches your situation. There is no required sequence.

What could follow

Use another resource when it helps the work in front of you. You can stop when you have the result you need.

  • You would prefer a guided business tool

    Find a tool for the job itself when building your own spreadsheet is not the next step you want.

    Tools

Bookmark this page to return to the same path. Use each tool’s save or download options to keep your work.

Keep your open draft?

Continuing will discard your unsaved changes. You can return to the draft and save or download it first.

Inside a real tool

The Cash Timing Planner

A screenshot from the working planner, using fictional figures. This example starts with $2,000, reaches a low of $300, and ends the eight weeks at $900.

Swipe across the preview to read the details.

Eight-week cash balance chart from October 1 to November 25, 2026. The lowest balance is $300; the expected end balance is $900. The dotted line marks the example's chosen $500 cash level.

The full tool lets you enter receipts and payments, try a change, and keep an editable copy.