Mortgage vs Marriage: The UK Numbers
Your £20,000 wedding doesn't cost £20,000. Run the actual mortgage maths and one number on the spreadsheet quietly more than doubles it.
Average UK first-time buyer deposit by region (2025)
| Region | Average deposit | Equivalent wedding budget | Years to save (£1k/month) |
|---|---|---|---|
| North East England | £35,000-£40,000 | A full wedding | 3 to 3.5 years |
| Midlands / North West | £45,000-£55,000 | 2x average wedding | 4 to 4.5 years |
| South West / East England | £60,000-£75,000 | 3x average wedding | 5 to 6 years |
| London | £125,000+ | 5-6x average wedding | 10+ years |
Sources: Halifax First-Time Buyer Review. Wedding average £20,000-£24,000 (Hitched, Bridebook).
Key takeaways
The average UK wedding now costs £20,000 to £24,000, which is a meaningful chunk of a first-time buyer deposit and bigger than most couples realise.
The hidden cost of a £20,000 wedding is not £20,000. Once you factor in the LTV band you miss and the compounded interest you pay across the mortgage, the true cost is closer to £40,000 to £60,000.
Marriage still has real legal and tax benefits over cohabitation in the UK. This is a financial decision, not just an emotional one.
For most couples the right answer is "both, in order, on a budget". A modest wedding first, then deposit-focused saving with a hard cap on each.