Pascaline

Estate Planning Suite

State Estate & Inheritance Tax beta

State estate tax for 12 states + DC and inheritance tax for 6 states, with correct Massachusetts / Oregon full-cliff and New York 105% cliff handling, state QTIP elections, and per-beneficiary inheritance tax.

Get an API key Docs

Endpoints

  • POST /estate/calculate-state-tax

MCP tools

  • calculate_state_estate_tax

Example

curl -X POST https://pascaline.io/estate/calculate-state-tax \
  -H 'content-type: application/json' \
  -H 'x-api-key: <keyId>.<secret>' \
  -d '{ ... }'

Responses include data_as_of, formula_version (2026.1), citations, and tier (beta). See the full reference and the verification process.

Massachusetts estate tax calculator API · New York estate tax cliff API · Oregon estate tax API · state inheritance tax API