To calculate Insurance Premium Tax on a UK policy, multiply the net premium by 0.12 for standard-rate cover or 0.20 for higher-rate cover. If the price you have already includes the tax, divide it by 1.12 or 1.20 instead to pull the IPT back out. That is the whole of the arithmetic. The work is in knowing which rate applies and whether the figure in front of you is net or gross.
Which Rate Applies to Your Policy
IPT has two rates: a standard rate of 12% and a higher rate of 20%.1GOV.UK. Insurance Premium Tax Rates Most personal and commercial policies sit on the standard rate: home, car, pet, private medical, professional indemnity, and general liability cover among them.
The higher rate of 20% applies in three situations:2HM Revenue & Customs. Notice IPT1 — Insurance Premium Tax
- Travel insurance, regardless of who sells it.
- Insurance for electrical or mechanical domestic appliances, but only when the policy is arranged through or supplied by the appliance retailer or someone connected to the retailer.
- Motor car or motorcycle insurance when arranged through or supplied by the vehicle dealer, hire company, or someone connected to them.
The trap with appliance and vehicle cover is that the seller of the goods has to be the one arranging the insurance for the higher rate to bite. Extended warranty bought at the shop that sold you the washing machine carries 20%. Standalone appliance insurance from an independent insurer carries 12%. Motor cover arranged at the dealership counter is 20%; the same policy shopped elsewhere is 12%.
A short boundary: some policies are outside IPT altogether. Life insurance, long-term insurance, reinsurance, and cover for commercial ships, aircraft, and international railway rolling stock carry no IPT at all, so there is nothing to calculate.2HM Revenue & Customs. Notice IPT1 — Insurance Premium Tax
Calculating IPT From a Net Premium
If you already know the net premium (the base cost before tax), take the rate as a decimal, multiply, and add the result back on.
Home insurance with a net premium of £400 at the standard rate:
- IPT: £400 × 0.12 = £48
- Gross premium: £400 + £48 = £448
Travel insurance with a net premium of £85 at the higher rate:
- IPT: £85 × 0.20 = £17
- Gross premium: £85 + £17 = £102
There is a wrinkle for higher-rate policies sold through an intermediary. If a broker or dealer selling 20%-rated cover charges a separate arrangement fee, that fee can itself carry 20% IPT.2HM Revenue & Customs. Notice IPT1 — Insurance Premium Tax A £50 arrangement fee on dealer-sold motor cover would attract another £10 of tax on top. Fees attached to standard-rate policies do not trigger this.
Extracting IPT From a Tax-Inclusive Price
Most quotes and renewal notices already have IPT baked into the headline figure, and insurers are not required to show the tax as a separate line.2HM Revenue & Customs. Notice IPT1 — Insurance Premium Tax To work out how much tax is in a gross premium, divide by 1 plus the rate:
- Standard rate: gross premium ÷ 1.12 = net premium
- Higher rate: gross premium ÷ 1.20 = net premium
Then subtract the net from the gross to get the IPT. A car insurance renewal of £560 breaks down as £560 ÷ 1.12 = £500 net, with £60 of IPT. A travel policy quoted at £120 breaks down as £120 ÷ 1.20 = £100 net, with £20 of IPT.
Don’t multiply the gross figure by 12% or 20% to get the IPT. That applies the rate to a number that already contains the tax and gives you too much. Divide first, then subtract.
Checking Whether a Quote Looks Right
Take the total you have been quoted and divide by 1.12, or by 1.20 if the policy is travel, dealer-sold motor, or retailer-sold appliance cover. The difference between the gross and net figures is the IPT. If the insurer shows the tax separately, compare the two. Rounding will account for a penny or two either way.
A larger gap usually means one of two things. Either a fee has been folded into the taxable base that you weren’t expecting, or the wrong rate has been applied. Motor cover you arranged yourself should be at 12%; if the numbers only reconcile at 20%, the insurer may have classified it as dealer-arranged. Ask for a breakdown before you pay.
One point worth knowing if you run a business: IPT is not recoverable. Unlike VAT, you cannot reclaim IPT paid on commercial insurance as input tax. Whatever the calculation produces is a real cost.