The stamp duty holiday in England and Northern Ireland ends on 30 June - but changes to the amount buyers have to pay will then be staggered.
The tax has been suspended on the first £500,000 of all property sales in England and Northern Ireland since July 2020.
What is the stamp duty holiday?
The government has increased the threshold at which stamp duty is paid on property sales from £125,000 to £500,000.
The move was aimed at helping buyers who might have taken a financial hit because of Covid and boosting a property market hit by lockdown.
It means anyone buying a home for under £500,000 won't have to pay any tax (stamp duty).
Previously, they would have had to pay up to £15,000 of the home's value to the government.
Usually, no tax is paid on the first £125,000 of a property's value.
Landlords and second-home buyers are also eligible for the tax cut, but will still have to pay the additional 3% of stamp duty they were charged under the previous rules.
When will the holiday end and what happens next?
The tax break was due to end on 31 March, but has been extended until 30 June.
After this date - until the end of September - there is a staggered return to previous stamp duty rates.
You won't pay any stamp duty on the first £250,000 of the purchase price (rather than the current £500,000).
From 1 October 2021, stamp duty rates are due to return to normal:
£0-£125,000 = 0%
£125,001-£250,000 = 2%
£250,001-£925,000 = 5%
£925,000-£1,500,000 = 10%
£1,500,000+ = 12%
Use the government's Stamp Duty Land Tax (SDLT) calculator to find out how much you would pay.
What other help is there for first-time buyers?
From July, first-time buyers will continue to not pay any stamp duty on property purchases up to £300,000.
High Street lenders are also starting to offer mortgages to borrowers with a deposit of just 5% - under a new government guarantee scheme.
The policy, announced in the Budget, is designed to help more first-time buyers secure a home.
The new scheme will be available to anyone buying a home costing up to £600,000, unless they are buy-to-let, second homes or. in some cases, new-builds.
The government is offering a partial guarantee to compensate lenders if the borrower defaults on repayments.
How much money does stamp duty raise?
The government's annual take from stamp duty is about £12bn, according to the latest figures released by HM Revenue and Customs (HMRC).
That's roughly equivalent to 2% of the Treasury's total tax take.
What about Scotland and Wales?
In Scotland, the normal rates on Land and Buildings Transaction Tax are:
2% on £145,001-£250,000
5% on £250,001-£325,000
10% on £325,001-£750,000
12% on any value above £750,000
Scottish landlords pay an extra 4% Land and Buildings Transaction Tax on top of standard rates.
In Wales, the normal rates on Land Transaction Tax are:
3.5% on £180,001-£250,000
5% on £250,001-£400,000
7.5% on £400,001-£750,000
10% on £750,001-£1.5m
12% on any value above £1.5m
However, the Welsh government also introduced temporary tax relief on the first tier. It means that, until the end of June, people buying their main homes in Wales costing less than £250,000 will not pay any tax.
Welsh landlords pay an extra 4% Land Transaction Tax on top of standard rates.