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650 Free Supercharging Miles: What a UK Tesla Referral Is Really Worth
How to work out what 650 free Supercharging miles are worth to you in pounds, how the credit is spent, and why we won’t quote a single made-up figure.
“650 free Supercharging miles” is the headline number of the UK Tesla referral. But what is it actually worth to you? The honest answer is a range, and here's how to find yours.
Why there's no single figure
Two things move the number: UK Supercharger pricing (which varies by site and time of day) and your car's real-world efficiency (which varies with speed and weather). Any page that gives you one exact pound figure is glossing over both. We won't invent one.
Work out your own number in 30 seconds
- Check your car's efficiency on the trip screen — say, miles per kWh.
- Divide 650 by that to estimate the kWh the credit covers.
- Multiply by the pence-per-kWh the Tesla app shows for your usual Supercharger.
Because both inputs move, treat the result as an estimate and re-check live pricing in the Tesla app.
How the credit is spent
The miles land on your Tesla account after delivery and are drawn down automatically when you Supercharge, until they're gone. There's nothing to redeem, but the reward does carry an expiry (see the clock on the credit, below) — so confirm current terms on the Tesla UK Refer & Earn page.
The bottom line
It's free money toward charging, with nothing to give up. Just don't confuse it with an FSD trial (that's a US benefit) or assume it stacks with the Electric Car Grant (most Teslas exceed the cap).
The part the arithmetic above still gets wrong
Work through the sum and you get a pound figure for 650 Supercharging miles. That figure is the credit's replacement cost — what the same electricity would have cost you at a Supercharger. It is the number everyone quotes, and for a lot of UK drivers it is too high, for a reason worth understanding before you weigh this benefit against anything else.
The credit only saves you what you would otherwise have spent. So the honest question is not "what is this electricity worth?" but "what would I have paid for this electricity if the credit did not exist?" And in the UK the answer splits sharply:
| How you'd have charged | Typical UK rate | What the credit saves you |
|---|---|---|
| Supercharging on a long trip | roughly 40–55p/kWh | The full amount. This is the case the standard sum describes. |
| Overnight at home on an EV tariff | roughly 7–10p/kWh off-peak | Only the home cost — a fraction of the headline figure. |
| A detour made just to use the credit | home rate, plus your time | Close to nothing, and possibly less than nothing. |
The gap between those first two rows is the whole point: UK off-peak home charging is roughly four to seven times cheaper than Supercharging. So 650 free Supercharging miles are worth several times more to a driver who road-trips than to one who charges in a driveway — even though both received exactly the same benefit, and every page quoting a single pound figure implies otherwise.
Practical test, and it takes one thought rather than a calculator: think about the next few months of driving and ask how many of those miles you would have Supercharged anyway. That is the portion where the credit is worth its headline value. If the answer is "hardly any", the benefit is real but modest, and you should not let it influence a purchase decision — which is a strange thing for a referral site to tell you, and true.
The clock on the credit
Tesla’s reward terms attach an expiry to referral rewards — commonly reported as twelve months from the grant date, the grant date being when the referred car is delivered rather than when the order was placed. An earlier version of this page said there was no expiry to worry about in normal use; that was too relaxed, and it is corrected above.
That changes the advice in a small but real way. The credit is not a balance that waits indefinitely for your next road trip, so the useful habit is to check the entitlement and its end date in the Tesla app after delivery and note that date. It also sharpens the point above: an expiring credit that only ever displaces cheap home charging can quietly be worth very little, whereas the same credit spent on one long summer trip is worth close to its full headline figure. Same benefit, same 650 miles — the value is decided by what you do with them, and by when.
Keep reading
Pillar: The benefit: 650 free miles · Related: The £37k grant catch
Disclosure: the links above are referral links — using one credits the owner with Tesla Credits at no cost to you, and gives you the buyer benefit. The Emerald Mile is an independent guide and is not affiliated with, endorsed by, or sponsored by Tesla, Inc. “Tesla” and “Supercharger” are trademarks of Tesla, Inc., used here nominatively.