Choose your simulator
Click on a tool to start your simulation
Real Estate Simulator
Calculate purchase costs, registration duties, notary fees and mortgage deed costs — accurate to the cent, updated 2026.
PCMN Chart of Accounts
Browse the complete Belgian Minimum Normalised Chart of Accounts — companies and NPOs. 1,025 sub-accounts, classes 1 to 7, compliant with ITAA 2021 & CBN.
Compound Interest Simulator
Calculate the growth of your savings through compound interest. Visualise the effect of time and rate on your capital with an interactive chart.
Invoice Withholding
Calculate the mandatory withholding on invoices for contractors and subcontractors in Belgium. Co-contractor, real estate works and fiscal/social debts.
Loan Simulator
Calculate your monthly payments and view your full amortisation schedule — constant annuity or constant capital, monthly, quarterly or annual frequency.
Director Rent Reclassification
Calculate the risk of fiscal reclassification of rent paid by your company to yourself (art. 32 ITC 92). Joint ownership, mixed use, furnished, pro-rata — full analysis.
Tax Quick-Memo
All key figures of Belgian taxation at a glance: C/C rates, BIK, km allowances, investment deductions, notional interest, fuel prices — tax years 2013 to 2027.
Why La Caverne de la Compta?
Tools designed for Belgian self-employed, accountants and students. Simple, reliable and always up to date with current legislation.
- ✓Calculations based on current Belgian legislation
- ✓Instant results, no registration required
- ✓Clear and intuitive interface for all user profiles
- ✓Accessible on mobile, tablet and computer