PHEV vs EV company car tax in 2026: which BIK rate actually wins?

If you are signing a company car order this summer and weighing a plug-in hybrid against a full electric, the maths has shifted again for the 2026/27 tax year that began in April 2026. The numbers I am working from come straight from HMRC’s benefit-in-kind easement guidance for plug-in hybrids, alongside the roadmap that fixed the electric percentages all the way out to 2029/30. I have spent the past few weeks running those published rates against the kind of real-world list prices buyers send me, and my honest view is that the PHEV-versus-EV question is now far less of a contest than the showroom would have you believe.

Let me show you why, because the headline rates flatter the hybrid and the detail does not.

The 2026/27 rates that actually decide it (company car tax)

For the 2026/27 tax year, a fully electric car taxed on zero CO2 sits at 4% BIK. That is a rise from 3% the year before, and it stings a little, but it is still the lowest band on the table. A petrol or diesel above 51g/km lands somewhere between 17% and 37% depending on emissions, so combustion is simply not in this conversation for a higher-rate taxpayer.

Plug-in hybrids are where it gets interesting, because they are no longer one band. As the P11D and BIK figures set out, a 1–50g/km PHEV is now sorted purely on its certified electric range:

• 130+ miles of electric range: 4%
• 70–129 miles: 7%
• 40–69 miles: 10%
• 30–39 miles: 14%
• under 30 miles: 16%

Read that ladder closely. Only a PHEV that can genuinely do 130 electric miles matches an EV’s 4%. Everything below it carries a premium, and most of the plug-in hybrids a fleet manager will actually put in front of you live in that 40–69 mile band at 10%.

A £40,000 car, a 40% taxpayer, real money

This is the comparison I keep coming back to, and it is the one that tends to end the debate around the kitchen table. Take a £40,000 car and a 40% taxpayer.

On the EV at 4%, the taxable benefit is £1,600, which costs £640 a year in tax. On a typical PHEV in the 40–69 mile band at 10%, the taxable benefit is £4,000, costing £1,600 a year. That is 2.5 times the EV bill for the same list price, a gap the What Car? company car tax guide lays out in the same terms.

Nearly a grand a year, every year, for choosing the hybrid badge. And that is before you have factored in that the PHEV only delivers its modest range if someone actually plugs it in, and a familiar problem with company hybrids is that plenty of drivers never do. The EV figure, by contrast, is the EV figure whether you charge at home or at a motorway pylon.

These are illustrative figures to show the size of the gap, not a personal tax calculation: your actual bill depends on the car’s P11D value, your income tax band and the car’s certified CO2 and electric range as of the 2026/27 tax year, so treat them as a guide rather than tax advice.

The 130-mile unicorn

I know what the optimistic reader is thinking: fine, I will just buy a 130-mile PHEV and have the 4% rate with a petrol safety net. I would love that car too. The problem is it barely exists. Plug-in hybrids that certify 130+ miles of electric range are genuinely rare on UK forecourts in 2026, and the handful that flirt with it tend to be large, expensive and quick to slip back under the threshold once you load them up.

So in practice you are not choosing between a 4% EV and a 4% PHEV. You are choosing between a 4% EV and, realistically, a 10% PHEV. Framed that way, the premium positioning argument lands hard: if you are spending £40,000-plus on a company car, you want the version that is both the nicer ownership experience and the cheaper one to be taxed on, not the compromise that costs more on both counts. The band-by-band breakdown from Apex is worth a read if you want to see how steeply the percentages climb once you step off the electric rung.

April 2028 is the cliff the salesman won’t mention

Here is the part that would genuinely stop me signing a four-year PHEV deal today. From April 2028, the whole range-banded structure for plug-in hybrids disappears. Every 1–50g/km PHEV moves to a flat 18% BIK for 2028/29, then 19% for 2029/30, regardless of how far it can travel on electric power. The 130-mile car and the 30-mile car pay the same.

Electric cars do not get that treatment. The roadmap I mentioned at the top keeps EVs on a gentle, predictable climb: 4% in 2026/27, 5% in 2027/28, 7% in 2028/29 and 9% in 2029/30. The detail behind those figures is set out clearly by The Tax Lead’s 2026/27 company car write-up.

Put the two side by side for 2028/29 and the gap is brutal: 7% for the EV against 18% for any plug-in hybrid. On that same £40,000 car for a 40% taxpayer, that is roughly £1,120 of tax on the EV versus £2,880 on the PHEV. A salary-sacrifice arrangement signed this year on a typical three or four-year term will run straight into that cliff, and the person sitting in the hybrid will feel it. As always, the exact figures depend on your circumstances and the rates in force at the time, so this is a planning guide rather than personal tax advice.

Where the hybrid still earns its place

I am not here to pretend the PHEV is dead. If your driving genuinely cannot accommodate an EV’s charging pattern (no home charger, long unpredictable rural runs, towing, a single car covering everything), then a plug-in hybrid at 10% is still dramatically better than a 30%-plus petrol equivalent, and the easement rules reward you for picking the longest electric range you can get. For a small number of drivers that trade-off is the right one, and I would sign it without hesitation.

But that is a fallback, not a strategy. It is the answer for the person who cannot run an EV, not the person choosing not to.

What I’d tick on the order form

For the overwhelming majority of higher-rate company car drivers ordering in 2026, I would take the fully electric car and not look back. You get the lowest band on the table now, a roadmap that climbs slowly and predictably rather than lurching, and you sidestep the 2028 flat-rate cliff entirely. The only readers I would steer towards a PHEV are those whose lives genuinely rule out an EV, and even then I would push them hard towards the longest electric range the budget allows, precisely because that advantage evaporates in 2028.

What would change my mind? A wave of affordable, properly engineered 130-mile PHEVs landing before April 2028, or a Budget that softens that flat-rate jump. Neither looks likely from where I am sitting. Until one of them arrives, the smart UK company car in 2026 is electric, and the only real question left is which one you want on the driveway.