Price
Always place the ‘£’ currency symbol in front of the number value without a space between.
£150
£ 150
If the price isn’t a whole number, include two decimal places.
- £6.40
- £20
- £6.4
- £20.00
For values larger than £999, use commas between every three zeros (also called ‘thousands separators’).
- £1,000
- £30,000
- £500,000
- £1,000,000
For values smaller than £1, we label the price with the shorthand ‘p’ for pence.
70p
£0.70
Displaying rates
By timeframe
Use ‘a’ as the denominator when writing about recurring costs over a specific timeframe, as it feels more conversational and natural.
- £20 a month
- £150 a year
- £20 per month
- £150/year
Only use the adjective forms such as ‘daily’ or ‘monthly’ in inline copy when you’re referring to timeframes.
Your monthly bill
£20 monthly
By energy use
Use ‘per’ as the denominator when referring to costs based on energy units.
Since ‘kWh’ is more widely recognised than ‘kilowatt hour,’ we use the acronym.
- 7p per kWh
- 7p per kilowatt hour
Price ranges
Write out ‘to’ to indicate a range, but if there’s not enough space, use the en dash in place of it.
Always include the currency symbol, right before the numeral value.
- £100 to £250
- £100 – £250
- £100 to 250
- £100–250
If you’re writing an undefined price range:
- use ‘up to’ for a price range that’s below the maximum
- use ‘and up’ for a price range that’s above the minimum
- Up to £100
- £50 and up
- £100 or less
- £50 or more
- £50+
- No more than £100
Numbers
We generally use numerical values when writing numbers because it’s better for scanning.
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However, we always spell out the number when we:
- use ordinals (‘1st,’ ‘5th’)
- include numbers in conjunctions
- refer to numbers in the hundreds and thousands in a general sense
- refer to round numbers in the millions and billions, or in a general sense.
- Be the first to sign up
- A one-time payment
- Save hundreds every year with solar panels
- We've planted 5 million UK trees since 2015
- There are millions that trust OVO with their energy
- Be the 1st to sign up
- A 1-time payment
- Save 100s every year with solar panels
- We've planted 5,000,000 UK trees since 2015
- There are 1,000,000s that trust OVO with their energy
For values larger than 999, we use commas between every three zeros (also called ‘thousands separators’).
- 1,000
- 10,000
- 100,000
- 1,000,000
- 10,000,000
- 100,000,000