The National Audit Office said £2.5bn was raised in tax for the government’s coffers last year from 30,000 estates.
Rising house prices over the last few years are seen as the main reason why more estates are becoming liable for the tax.
Under current laws, an estate worth in excess of the £263,000 threshold is taxed at a 40% flat rate.
Because of the surge in house prices, the government has been lobbied to increase the tax threshold so that it catches up with house price inflation.
Committee expresses concern about costs to businesses and April 2018 implementation date
Drastically fewer offices for HMRC in the hope to reduce their running costs
An 80% increase in additional revenue for HMRC coincides with a crackdown on income tax avoidance
Laurence Field, the head of tax at national audit, tax and advisory firm Crowe Clark Whitehill outlines the 6 'unexpected items' regarding HMRC's Making Tax Digital plans