BYD Sealion 7 Comfort RWD cost to own in the UK — the true 5-year total
The BYD Sealion 7 Comfort RWD starts at £46,990. Over 5 years, owning one (EV) costs about £49,584 in the UK as of August 6, 2026 — £826/month, £0.83/mile — including depreciation, charging (with the ~12% charging loss most calculators ignore), maintenance, insurance, financing and VED. That's £2,204 less than a comparable Mercedes-Benz GLC 220d 4Matic AMG Line over the same 5 years.
BYD Sealion 7 Comfort RWD incentives & grants
UK Electric Car Grant: up to £3,750 off the price of an eligible new EV (RRP ≤ £37,000, applied by the dealer). Shown for reference; not included in the totals above. Source: GOV.UK Electric Car Grant.
BYD Sealion 7 Comfort RWD · UK · 5-year estimate£49,584 total · £826/mo · £0.83/mi
Where the money goes
| Cost component | Electric · BYD Sealion 7 Comfort | Hybrid · Mercedes-Benz GLC 220d 4Matic |
|---|---|---|
| Depreciation (estimated) | £29,134 (59%) | £25,928 (50%) |
| Charging / fuel | £6,897 (14%) | £9,290 (18%) |
| ↳ of which charging loss | 12% (~£828) | — |
| Maintenance | £1,500 (3%) | £1,998 (4%) |
| Insurance | £2,780 (6%) | £2,625 (5%) |
| Financing interest | £8,273 (17%) | £9,188 (18%) |
| Registration & fees | £1,000 (2%) | £2,760 (5%) |
| Total cost of ownership | £49,584 | £51,788 |
BYD Sealion 7 Comfort RWD specs & assumptions
- Starting price (RRP)
- £46,990manufacturer
- Powertrain
- Electric
- Efficiency
- 29.8 kWh/100miWLTP
- Range
- 300 miWLTP
- UK electricity
- 26.11p/kWhOfgem
- Annual miles (assumed)
- 12,000UK average
Road tax (VED) for EVs 2026
VED on the BYD Sealion 7 Comfort RWD is £200/yr — the flat standard rate EVs now pay — and it is included in every total on this page. Source: GOV.UK vehicle tax rates.
Cost to charge the BYD Sealion 7 Comfort RWD at home
The BYD Sealion 7 Comfort RWD runs about £8.84 per 100 mi at home — versus about £17.42 for a typical 40 mpg petrol car. Home charging only (the ~12% AC charging loss is included); public DC fast-charging is billed per session by each network — often 2–3× the home rate — and isn't in these figures.
- Per 100 mi at home
- £8.8429.8 kWh/100mi + 12% charging loss × £0.26/kWh
- A typical 40 mpg petrol car
- £17.42/100miat £1.53/litre — for comparison
Compare the BYD Sealion 7 Comfort RWD against any car, your mileage & your scenario
What the numbers say
The BYD Sealion 7 Comfort RWD costs about £49,584 to own over 5 years in the UK — £826/month, £0.83/mi at 12,000 mi/yr — and depreciation is the biggest line: £29,134, 59% of the total (as of August 6, 2026).
- The BYD Sealion 7 Comfort RWD edges it — a real £2,204 saving over 5 years, though small enough that your own annual distance and home tariff decide it.
- The BYD Sealion 7 Comfort RWD pulls ahead of the Mercedes-Benz GLC 220d 4Matic AMG Line if you drive more than about 3,000 mi/yr.
- On cost per month the BYD Sealion 7 Comfort RWD ranks #2 of 4 mid-size SUV (D-segment) models we track in the UK.
- Where the BYD Sealion 7 Comfort RWD's £49,584 actually goes: depreciation £29,134 (59%), financing interest £8,273 (17%), charging £6,897 (14%), insurance £2,780 (6%), maintenance £1,500 (3%), registration & fees £1,000 (2%).
- Per mile, that is £0.49 of depreciation and £0.11 of charging, with £0.23 for everything else — £0.83/mile all-in.
- Charging vs the fleet: the BYD Sealion 7 Comfort RWD's 5-year charging bill (£6,897) runs £1,227 above the £5,670 median of the 27 EVs we price at the same rates.
What we assume for maintenance
Assumed £300/yr for an EV at 12,000 mi/yr — about £1,500 of the 5-year total above. On this market's assumptions an EV runs about £150/yr less in maintenance than a petrol car (£300 vs £450). See the methodology for sources; adjustable in the calculator.