Most people have no idea how much pension they actually need. This calculator tells you.
Enter what you want to spend in retirement. Subtract your state pension. Get the number you actually need to save. This is the calculation the financial industry doesn't do for you.
Your Retirement Goals
The income you want in retirement per year
Your Current Savings
Your Target Pension Pot
Your projected savings meet your retirement target
The 4% Rule Explained
The 4% rule is a common retirement planning guideline. It suggests you can withdraw 4% of your pension pot each year without running out over a 30-year retirement.
See if you're on track
Delphina connects all your pensions in one place to show you exactly where you stand and what to do next.
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How Much Pension Do You Really Need?
The Number That Changes Everything
Most people have no idea how much they need in their pension pot. They save blindly, hoping it's enough, without ever doing the math. The truth is that "how much pension do I need" has a concrete answer — and once you know it, planning becomes substantially simpler.
The standard rule of thumb is the 4% rule: you need roughly 25 times your desired annual retirement income. If you want £30,000 per year, you need around £750,000. If you want £40,000 per year, you need £1,000,000. This isn't a precise figure — it's a planning guide based on historical data suggesting a 4% withdrawal rate sustains your portfolio for 30 years.
But here's what many retirement calculators miss: the State Pension. If you qualify for the full State Pension (£12,548 per year), you only need £17,452 from your private pension to hit £30,000 annual income. That reduces your required pot from £750,000 to around £436,000. The numbers suddenly become much more achievable.
What Does a Comfortable Retirement Actually Cost?
The PLSA (Pension and Lifetime Savings Association) publishes retirement living standards that are more useful than abstract numbers. Their "comfortable" standard suggests £43,000 per year for a couple, £34,000 for a single person. This includes holidays, eating out, some car costs, and hobbies — not luxury, but genuinely comfortable.
However, these figures assume mortgage-free home ownership and no outstanding debts. If you're still paying a mortgage or have other debts, your number is higher. If you're mortgage-free with low running costs, you might need less. The calculator lets you input your specific desired income, so you get a number that's actually relevant to your situation.
Don't make the mistake of assuming you need the same income in retirement as you earn now. Most retirees find their spending drops significantly. You've paid off your mortgage, your children are likely independent, and you're not commuting or buying work clothes. Many couples find they live comfortably on £30,000-£40,000 per year, even if they earned £60,000+ before retirement.
The Gap Between What You Have and What You Need
The gap analysis is where the real insight lives. If your projected pension pot generates £25,000 per year and you want £35,000, you have a £10,000 annual gap. That doesn't sound catastrophic — but at a 4% withdrawal rate, it represents a £250,000 shortfall in your pot.
The calculator shows you exactly how to close that gap. You can increase your monthly contributions, adjust your retirement age, reduce your desired income, or some combination. Each option has trade-offs. Increasing contributions costs more now but less overall. Retiring later gives compound growth more time to work. Reducing desired income is uncomfortable but mathematically effective.
The key insight: small changes now have large effects later. Increasing your monthly pension contribution by £200 might cost £72,000 over 30 years. But with average returns, it could add £150,000 or more to your final pot. The cost is immediate and visible; the benefit is distant and invisible. This asymmetry is why most people under-save.
Building Your Pension Pot at Different Ages
Starting age dramatically affects how much you need to contribute. A 25-year-old saving £300 per month with average returns could reach £1,000,000 by 65. The same 25-year-old saving £300 per month from 45 would only reach around £350,000. Time is the most powerful variable in compound growth, and it's the one you can't get back.
If you're starting late, don't panic. The calculator shows you what's achievable on your current trajectory. If the number is too high, consider a gradual increase: raise your contribution by 1% of your salary each year as your career progresses. Even small increases compound significantly over time.
At any age, the right time to start is now. If you're 50 with zero pension savings, the calculator might show retirement at 70 with modest contributions. That's not ideal, but it's substantially better than not saving at all. The alternative — relying solely on the State Pension — means accepting a very limited lifestyle in retirement.