Based on cost-of-living indices (Newcastle 61 vs Cardiff 64, London = 100), £90,000 in Newcastle has the same purchasing power as approximately £94,450 in Cardiff. Cardiff is 5% more expensive overall.
The equivalent accounts for the real cost of maintaining the same standard of living. Newcastle rent averages £750/month versus £900/month in Cardiff — a +£150/month premium. Beyond rent, Cardiff is overall 5% more expensive across groceries, transport, restaurants, and utilities (Numbeo COL index 64 vs Newcastle's 61).
To achieve the same disposable income in Cardiff, you would need to earn £94,450 — calculated using Rightmove Q1 2026 rental data and HMRC 2025/26 tax rates. Any offer below £94,450 in Cardiff represents a real-terms pay cut.
COL indices from Numbeo 2025 (London = 100). Rent = Rightmove Q4 2025 median for a 1-bed flat.
Moving from Newcastle to Cardiff costs £150/month more in rent (£750 → £900/mo).
You need £94,450 in Cardiff to match your Newcastle lifestyle — £4,450 more than your current Newcastle salary.