There's no single right answer. But there are well-established benchmarks, and understanding where you sit relative to them tells you exactly what to do next.
The 20% benchmark — and what it means for UK salaries
The most widely cited savings target is 20% of net take-home pay. Here's what that looks like at different income levels:
- £25,000 salary (£1,720/month net): save £344/month
- £35,000 salary (£2,360/month net): save £472/month
- £50,000 salary (£2,930/month net): save £586/month
- £75,000 salary (£4,150/month net): save £830/month
If these numbers look ambitious given your rent and bills, you're not alone. UK housing costs — particularly in London and the South East — consume a much larger share of income than the 50/30/20 rule was designed around. Adjust the percentage to what's sustainable and increase it as your income grows.
What to save first: the order matters
Not all saving is equal. This is the priority order that most financial planners use:
- Step 1: Build a £1,000 starter emergency fund
- Step 2: Pay off any high-interest debt (credit cards, personal loans above 5%)
- Step 3: Build emergency fund to 3–6 months of essential expenses
- Step 4: Maximise employer pension match (this is a 100% instant return)
- Step 5: Invest remaining savings (ISA, pension, index funds)
Step 4 is the one most people skip. If your employer matches pension contributions up to 5% and you're only contributing 3%, you're leaving free money on the table.
Age benchmarks for UK savers
A commonly used framework from Fidelity suggests:
- By age 30: 1× annual salary saved
- By age 40: 3× annual salary saved
- By age 50: 6× annual salary saved
- By retirement (67): 10× annual salary saved
On a £37,000 salary: £37,000 by 30, £111,000 by 40, £222,000 by 50. These are targets designed for a comfortable retirement, not absolute requirements. Starting at 35 instead of 25 means saving more each month — but it is still entirely achievable.
The compounding argument for starting now
£300/month invested at 7% annual return:
- Starting at age 25: £912,000 at age 65 (40 years)
- Starting at age 35: £454,000 at age 65 (30 years)
- Starting at age 45: £196,000 at age 65 (20 years)
The same £300/month produces nearly 5× the outcome when started 20 years earlier. That's the compounding effect — and the strongest argument for starting with whatever amount you can afford, today.
Use the savings calculator to model your own scenario — enter your current savings, monthly contribution, expected return, and time horizon to see where you'll be.