Thank you for your question..
A gain from sale of residential property is chargeable to CGT.
There are reliefs and allowances available against this gain if certain criteria is met
100% private residence relief is available against the gain if the property remains your main and only residence for the whole period of ownership.
Provided the property remains your daughter's main and only residence from the time she has inherited it to point of sale, there would be no CGT payable as it would be covered by private residence relief.
For CGT purposes, the gain would be the difference between the net proceeds from sale and the value of it at the time of death.
In the event your daughter decides to move out of the property and sell it at a later date, then her private residence relief would be calculated based on the period the property has been main residence out of total period of ownership.
Any gain not covered by PRR would be chargeable to CGT. She would be entitled to gains annual allowance (this tax year it is £11,100) and the balance would be taxed at 18%, 28% or a combination of both depending on her taxable income including the gain in the year of sale.
More information on private residence relief is covered in HS283 here
How CGT is calculated is covered here
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