Free tools to run a smarter business.
Calculators, spreadsheets and checklists built for software founders. Use them free, no strings.
Business Health Check
Upload your trial balance and get an instant snapshot of your financial health, what's strong, what needs work, and how Aethon can help.
LTV:CAC Ratio Builder
See whether your unit economics stack up. Work out your customer lifetime value against your acquisition cost in under a minute.
MRR & ARR Calculator
Turn your subscriptions into clean recurring-revenue figures, including upgrades, downgrades and churn.
Cash Runway Calculator
Find out exactly how many months of runway you have left at your current burn rate.
VAT Deadline Tracker
A simple spreadsheet to keep every VAT quarter, deadline and payment in one place.
SaaS Metrics Cheat Sheet
Every SaaS number that matters, what it means and how to calculate it, on one page.
Month-End Bookkeeping Checklist
The step-by-step checklist we use to close the books cleanly every month.
Need more than a tool?
Nothing beats an accountant who genuinely understands how your business makes money. Book a free call and let's get into it.