Umbrella vs limited company: which keeps more of your money?
Two contractors on the same day rate can take home very different amounts. Here's how umbrella and limited-company pay actually differ, and when each one makes sense.
In short: Company car tax is your income tax band applied to a benefit-in-kind value, which is the car's P11D value multiplied by an emissions-based percentage. Electric cars currently sit at a very low percentage, so the tax is a fraction of an equivalent petrol car's — often the difference between a few hundred pounds and a few thousand a year.
A company car used to be a perk that quietly cost higher earners a fortune in tax. Electric cars flipped that on its head, and the gap between an EV and a petrol equivalent is now large enough to change which car you’d choose. Understanding why comes down to one mechanism: benefit-in-kind.
How company car tax works
A car you can use privately is treated as a perk with a cash value, and you pay income tax on that value. HMRC sets the value as a percentage of the car’s P11D value — broadly its list price including VAT and delivery. That percentage is driven by the car’s emissions: cleaner car, lower percentage, lower taxable benefit. Then your own income tax band decides what you actually pay on it.
So three levers move the number: how expensive the car is, how clean it is, and whether you’re a basic, higher or additional-rate taxpayer. You can try combinations in the Company Car BIK Calculator.
Why the EV gap is so big
The benefit-in-kind percentage for a fully electric car is currently tiny compared with petrol or diesel. Because the taxable benefit is that percentage of the P11D value, a low percentage means a small benefit — and therefore a small tax bill — even on a pricey car.
Put rough numbers on it. A £40,000 electric car at a 3% benefit rate gives a taxable benefit of £1,200; a higher-rate taxpayer pays 40% of that — about £480 a year. A petrol car of similar value emitting around 120 g/km could sit near a 29% rate, a benefit of roughly £8,700, costing a basic-rate taxpayer around £1,740 a year and far more at the higher rate. Same sort of price, wildly different tax.
Petrol, diesel and plug-in hybrids
For petrol and diesel cars, the percentage climbs with CO2 emissions up to a cap, and diesels that don’t meet the RDE2 standard pick up a surcharge. Plug-in hybrids are a special case: their band depends on how far they go on electric power alone, so a longer electric-only range means a lower band. If you’re comparing a hybrid, the electric range genuinely matters to the figure.
Car or cash allowance?
Many employers offer cash instead of a car. Whether the car or the cash wins depends heavily on these numbers — a clean EV is often the better deal, while a higher-emission petrol car can make the cash more attractive once you’ve worked out the tax. If you’re a contractor weighing how to take value out of your company, it’s worth reading alongside the umbrella vs limited company comparison.
General information, not tax advice. Benefit-in-kind percentages change year to year — confirm the exact band for a specific car and year with HMRC or your accountant.