Pascaline

Estate Planning Suite

Federal Estate Tax & Portability beta

Federal estate tax with unified-credit and portability (DSUE) mechanics under the permanent $15M exemption, plus the state estate tax for the domicile state.

Get an API key Docs

Endpoints

  • POST /estate/calculate-federal-tax
  • POST /estate-tax/calculate

MCP tools

  • calculate_estate_tax

Example

curl -X POST https://pascaline.io/estate/calculate-federal-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.

estate tax calculator API 2026 · portability DSUE calculator · estate tax API developer