Millions of people across the UK are shouldering what has become known as the "singles tax", the financial penalty of covering rent, council tax, utilities and groceries without anyone to split the bill.
New analysis from Zable examining 35 cities reveals that close to one in three British households now comprise just one person, leaving these residents to bear expenses entirely alone.
The research found that those living independently spend 38 per cent more annually on average compared to someone dividing costs equally with a partner or flatmate.
Edinburgh and Oxford follow London in cities where this premium hits hardest, at 49 per cent and 44 per cent respectively. Brighton and Hove emerged as the toughest place for solo dwellers, with essential costs swallowing 87 per cent of a single person's earnings.
Single Britons are paying more than their coupled counterparts
|GETTY
Brighton and Hove emerged as the toughest place for solo dwellers, with essential costs swallowing 87 per cent of a single person's earnings.
The seaside city's rental market proves particularly punishing, with one-bedroom flats averaging £1,191 monthly, which is the fourth priciest outside the capital.
Council tax adds further strain, with average charges of £1,330 annually for smaller properties ranking among the five highest in the study.
The South East location compounds these pressures, as regional household spending reaches £996 per person each month. This translates to roughly £11,949 yearly on everyday essentials including food, transport and utilities.
How much is the 'single tax' in your area?
|ZABLE
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How much you could lose if Isa earnings were subject to income tax, broken down via interest rate and tax bracket | GBNDerby stands at the opposite end of the spectrum, claiming the title of Britain's most affordable city for single residents. Living costs there consume just 53 per cent of post-tax income, offering considerably more financial flexibility.
One-bedroom accommodation averages £586 monthly, while shared rooms cost approximately £482, which is a fraction of Brighton's prices.
Annual council tax remains reasonable at £1,189 for band A and B properties, and East Midlands residents benefit from lower everyday expenses at around £808 per person monthly.
London presents a paradox in the data, ranking only seventh for overall affordability despite commanding the nation's highest living expenses at £30,636 annually.
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The capital's elevated salaries, averaging £39,298 after deductions, cushion the blow, yet Londoners still face the steepest singles tax at 57 per cent more than those sharing costs.
Arielle Rogers-Jenkins, a senior product manager at Zable, offered practical guidance: "Start by auditing your fixed costs and see where adjustments can be made.
"Council tax discounts, for example, are something single occupants are entitled to but don't always claim correctly."
She recommended switching broadband and utility providers where possible, noting that small savings across multiple bills accumulate quickly.