Single-year simulation

Tax bill calculator

Enter a household and a year of events, then run it through the engine's /v1/simulate endpoint to see federal + state tax, NIIT, AMT, IRMAA, the MAGI variants, and the full bracket-fill audit trail.

Dashboard
Household
Accounts
Tax year

Income sources

Roth conversions

Withdrawals

Capital gains realized

Contributions

Pre-filled with the “Marcus” ACA-bridge worked example.