About CFO Brain
A 13-week cash habit in a file you own: see the week your business drops under its floor, test a decision before you make it, pay once, no login.
Who makes it
Rami Tanous, Berlin, Germany. I made the workbook, the simulator and the free starter, and I answer the mail myself.
I am not a CFO, an accountant or a tax adviser. Where a question needs one, I will say so.
Questions about the file: hello@getcfobrain.com, answered within 2 working days. Full legal details are in the legal notice.
Talk to me
A free 15-minute call checks whether a Build Session fits. For bookkeepers and accountants there is a 20-minute talk instead.
What it is
A spreadsheet workbook, a free 13-week starter and a free simulator. The formulas do the arithmetic; an assistant you choose can explain the result. It is not an AI agent.
What CFO Brain is not
It is not accounting, bookkeeping or tax advice. It does not connect to your bank or your accounting software, so it only knows what you type. It is not a forecast you can hand to a lender as audited. If you are in serious financial difficulty, talk to a lawyer or an insolvency adviser first.
What happens to your numbers
- The simulator runs in your browser and sends nothing.
- The workbook is a file on your computer. I never ask for a bank login.
- I keep your email address if you sign up, what you write to me if you ask for a call, and your order details if you buy. See the privacy policy.
Check me, from quick to thorough
Every rung is something you can open. None of it asks you to trust me.
- Try the simulatorFree, no signupFour numbers, six decisions, 26 weeks. It runs in your browser and sends nothing.
- Open the worked exampleA made-up business with every number on the page, including the week it goes wrong.
- Read a formula from the file324 formulasPick a cell, read the formula, check the answer by hand.
- See what a Build Session producesExample businessThe one-page Cliff Brief, filled for the example business. Not a customer.
- Read how every number is calculatedAnd the list of what has not been tested.
- Follow the changelogExcel and Google Sheets: not checked yetChecked in Apple Numbers. The day the other two are checked, the date goes here.
There are no customer quotes on this site yet. They will appear only when a customer writes them and agrees in writing that I may publish them.
Want to see how it works on your numbers?
A free 15-minute call is enough to find out, and you never need to buy anything.