Frequently Asked Questions
What salary in London matches £80,000 in Cardiff?
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£125,000 in London provides the same purchasing power as £80,000 in Cardiff.
This is based on Cardiff's COL index of 64 vs London's 100 (London = 100, Numbeo 2025).
The 56% cost difference translates directly to a 56% higher equivalent salary.
Is London significantly cheaper than Cardiff?
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London is 56% more expensive overall than Cardiff.
The most visible difference is rent: Cardiff averages £900/month for a 1-bed flat
vs £2,050/month in London
— a premium of £1,150/month (£13,800/year).
How is the salary equivalence calculated?
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SalaryDex uses city-level cost-of-living indices from Numbeo 2025, normalised so London = 100.
The formula is: equivalent = salary × (cityB COL ÷ cityA COL).
For this page: £80,000 × (100 ÷ 64) = £125,000.
The index captures overall cost differences including rent, food, transport, utilities and services.
It does not account for individual tax positions or lifestyle choices.
Should I accept a lower salary to move from Cardiff to London?
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Moving to London requires a higher salary to maintain your standard of living.
You need approximately £125,000 — £45,000 more than your current £80,000 in Cardiff.
London is 56% more expensive overall and rent averages £2,050/month vs £900.