Inheritance tax must be settled before you can apply for probate. It may have to be paid if the estate is valued at more than £325,000, with exceptions if a spouse or civil has inherited it.
Whether inheritance tax needs to be paid is dependent on the deceased’s allowances.
You must know whether or not there is anything to pay before proceeding because it makes up part of the value of the deceased’s estate.
In order to figure out whether or not there is any inheritance tax due, you need to estimate the value of the estate of the person who died and compare it to the allowances available to the deceased…
If there is any inheritance tax due, pay it to the HM Revenue & Customs (HMRC) and wait 20 days before filing an application for probate.
You can apply for probate on GOV.UK and it lists all the necessary documents to have and forms to fill out.
It’s also worth noting that if the value of the estate is less than £5000 then you won’t need to pay a fee to do so, but if it’s more than that you have to pay £273, whether you apply online or by post.