How to Build a Budget UK: A Step-by-Step Guide
Most budgets fail before the first month is out. The problem isn't discipline. It's that you started in the wrong place. The step that needs to happen before any spreadsheet opens.
Sinking funds - the line that keeps a budget alive
| Sinking fund | Typical annual cost | Monthly contribution |
|---|---|---|
| Car (MOT, insurance, repairs) | £1,100 - £2,400 | £90 - £200 |
| Christmas and birthdays | £400 - £1,000 | £35 - £85 |
| Dental and optician | £200 - £600 | £20 - £50 |
| Holidays | £1,000 - £3,000 | £85 - £250 |
| Home repairs and boiler | £300 - £800 | £25 - £70 |
Annual cost divided by 12. Use named pots in Monzo, Starling or Chase.
Key takeaways
Budgeting is half about earning, not just spending. Decide which side is your bigger lever before setting any category caps.
The 90-day audit is the load-bearing step. Once you can see where your money goes, the awareness itself does most of the work.
Cut by cost-per-hour, not by 'is it discretionary'. A £15 streaming service that fills your evenings is cheaper than a single takeaway.
Sinking funds for irregular costs (MOT, Christmas, dental) are what stop a budget collapsing in December. Perfection is not the goal.