Child benefit
Policy coverageDrafted in the engine, awaiting validation before it appears online.
BEAMM is a permanently evolving project. Here’s what we’re building across the platform
Last reviewed: June 2026
Work is grouped into six areas of the platform:
- Policy coverage The taxes and benefits you can reform in the simulator.
- Realistic data How lifelike and up-to-date the synthetic population is.
- Behavioural responses Whether the model accounts for how people respond to a reform.
- Trustworthy results The testing, validation and engineering rigour behind every number.
- Impact analysis How you explore and visualise who gains and who loses.
- Documentation Written explanations of how each part of the model works.
Hover or focus a tag to see what each area covers.
Now
In active developmentVersioned, reproducible data
Realistic dataRebuilding how the synthetic population is produced so every dataset is versioned, regenerable and auditable end to end.
Validation against official statistics
Trustworthy resultsA validation harness that checks simulated aggregates against published official figures.
Next
Scheduled for the next cycleInheritance & gift tax, real property tax
Policy coverageWealth-transfer and property instruments.
More realistic synthetic households
Realistic dataImprovements to the algorithms that generate the synthetic population, making it an even more faithful stand-in for real Belgian households.
Uncertainty & error reporting
Trustworthy resultsCommunicating the inherent uncertainty in simulation results.
Compare one reform against another
Impact analysisSave your reforms and compare them head to head — not only against today's system, but reform A directly against reform B.
Later
On the horizonSocial security, pensions, income support
Policy coverageThe social-protection side of the system.
Nowcasting & year selection
Realistic dataBring the population up to the present day and let you choose the policy year to simulate.
Labour-market responses
Behavioural responsesHow people change work decisions in response to a reform.
Consumption & mobility responses
Behavioural responsesHow spending and travel choices shift in response to a reform.
Break results down by more than income
Impact analysisSee who gains and who loses not just by income, but by household type and family situation.
Methodology & instrument documentation
DocumentationClear public write-ups of how each instrument is modelled.
Recently shipped
Interactive charts & theming
Richer, interactive visualisations.
Impact analysisPerformance benchmarking and ongoing profiling
We profile where the engine spends its time, and every release is automatically checked against slow-downs — so the tool stays fast as it grows.
Trustworthy resultsFaster, refreshed interface
Rebuilt for speed, with a refreshed visual identity.
Impact analysisEstablished workflow for lawful, documented, tested instruments
Every instrument is referenced to the law and covered by an automated test suite.
Trustworthy resultsRebuilt simulation engine
The calculation engine was rebuilt from the ground up into a modular, rigorously-tested system — far more reliable, markedly faster, and easier to extend with new instruments.
Trustworthy resultsCore instruments — income tax, VAT, excise, investment income, car taxation
The first set of instruments you can reform in the simulator today.
Policy coverage