City A
Annual salary (gross)
£
City B
Annual salary (gross)
£
Home size
I have children in childcare
Number of children
Pre-school age (assumed age 2)
Hours per week (per child)
hrs
Nursery rates: London £9.00/hr, Cardiff £6.00/hr. Includes free hours and Tax-Free Childcare where eligible.
Pension contribution
Applied to both cities
%
Student loan plan
Tax code
Default 1257L
Share your result
The verdict
You're £596/mo better off in Cardiff
London disposable
£178
Cardiff disposable
£774
Net pay — London
£3,405/mo
£40,862/year from £55,000
Net pay — Cardiff
£2,459/mo
£29,512/year from £38,000
Annual difference
£7,152/yr
In favour of Cardiff
Where your salary goes (monthly)
Cost-of-living breakdown (monthly)
Detailed monthly comparison
Category
London
Cardiff
Income
Gross salary
£4,583
£3,167
Income Tax
-£694
-£392
National Insurance
-£255
-£157
Pension
-£229
-£158
Net take-home
£3,405
£2,459
Monthly costs
Rent (1-bed)
-£2,100
-£900
Council Tax
-£175
-£155
Transport
-£160
-£65
Groceries
-£280
-£230
Eating Out & Social
-£250
-£140
Utilities
-£150
-£130
Broadband
-£32
-£30
Occasional Uber
-£80
-£35
Total costs
-£3,227
-£1,685
Disposable income
£178
£774
Guide
How we calculate your comparison
- Income Tax (England or Scottish bands, auto-detected by city)
- National Insurance contributions
- Pension salary sacrifice
- Student loan repayments (if applicable)
- Personal Allowance taper for salaries above £100k
- Rent: average 1-bed flat (HomeLet Rental Index, ONS)
- Council Tax: Band D average (GOV.UK)
- Transport: monthly commute (TfL, local transit data)
- Groceries: single adult monthly spend (ONS Family Spending)
- Utilities: gas, electric, water (Ofgem, regional data)
- Broadband: average monthly cost (Ofcom)
- Disposable = net take-home pay - total monthly costs
- This is what you have left to spend, save, or invest
Cost-of-living figures are city averages. Your actual costs will vary based on neighbourhood, lifestyle, and personal choices. Use this as a starting point for comparison, not a guarantee. Tax rates and thresholds are for the 2025/26 UK tax year. This is not financial advice.
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