Estate Map vs HMRC Inheritance Tax Calculator | Comparison 2026

Honest comparison of the HMRC inheritance tax checker and Estate Map IHT calculator. The HMRC checker covers the basic nil-rate band threshold. Estate Map models the residence nil-rate band, transferred spouse allowances, business property relief, agricultural relief, 7-year gift taper, April 2026 BPR cap, and April 2027 pension inclusion across three scenarios.