Turnover records
A digital ledger of realized turnover: log income and expenses in one place and always have an up-to-date business overview — without keeping spreadsheets by hand.
Freeturnover records, invoices and limit tracking for flat-rate taxpayers
Tax Calculator is an app for flat-rate taxpayers developed by Finaccons. Keep a digital turnover ledger, create and send invoices, and track your annual and per-client limits — with a direct connection to your Google Sheets document.
What the app does
Limit tracking
Automatically track the annual flat-rate taxation limit and the per-client limit (60% rule), so you know in time how much you can still invoice.
Invoicing
Create PDF invoices in accordance with local regulations, track them by client and share them directly from the app.
What's new
Google Sheets synchronization
Data connects directly to your Google Sheets document — the app reads and updates the same file without a manual export/import process.
Simple onboarding
Connect an existing sheet or create a new document with all necessary sheets: expenses, clients and company profile.
Complete data control
Data remains in your Google account. The app only uses permissions you explicitly granted.
Important links
Privacy policy
Explains in detail which Google accounts and Sheets permissions we use and why. Read the privacy policy →
Contact support
Email pausal@finaccons.rs for help with setup or bug reports.
Development plan
Adding client analytics, XML/JPKD format export and much more.
Ready to start?
Sign in with your Google account and connect your Google Sheets document in a couple of minutes.
Launch Tax Calculator →