Retirement Calculator: How Much Should You Save?

"Am I saving enough for retirement?" is one of the most common financial questions people ask — and one of the hardest to answer without a proper tool. The right amount depends on your age, income, current savings, expected retirement age, and lifestyle goals. That's exactly what a retirement calculator is built to work out.

In this guide, we'll explain how retirement planning works, the key rules of thumb used by financial planners, and how to estimate your retirement target in both the UK and the USA alongside related tools like our Mortgage Calculator, Loan Calculator, and Closing Cost Calculator.

Quick Answer: The 15% & 25x Rules

A standard benchmark is to save 15% of your pre-tax income for retirement starting in your 20s or 30s. To estimate your total retirement target pot, multiply your desired annual retirement income by 25 (the 25x rule, based on a 4% annual withdrawal rate).

Savings Benchmarks by Age

Age	Target Savings (Multiple of Annual Salary)
Age 30	1x Annual Salary
Age 40	3x Annual Salary
Age 50	6x Annual Salary
Age 60	8x Annual Salary
Age 67	10x Annual Salary

Retirement Systems: UK vs USA

In the UK, savers rely on the State Pension combined with Workplace Pensions (auto-enrolment) and SIPPs/ISAs. In the USA, workers use Social Security alongside 401(k) plans, 403(b) plans, and Traditional or Roth IRAs.

Managing debts before retirement is critical. You can model payoff timelines with our Student Loan Calculator, HELOC Calculator, and Business Loan Calculator.

Frequently Asked Questions

How much should I save for retirement each month?

A common guideline is to save around 15% of your gross income, including employer contributions, though the right amount depends on your age, current savings, and retirement goals.

What is the 4% rule in retirement planning?

The 4% rule suggests that withdrawing 4% of your retirement savings annually should allow your portfolio to last through a typical 25 to 30 year retirement, based on historical market return assumptions.

How much money do I need to retire comfortably?

A widely used estimate is 25 times your desired annual retirement income (the '25x rule'), though this varies based on other income sources like a state pension or Social Security.

Is the UK State Pension enough to retire on?

Generally no. The UK State Pension is designed as a foundation of retirement income rather than a full replacement for pre-retirement earnings, which is why workplace and private pensions are important supplements.

Is Social Security enough to retire on in the US?

For most people, no. Social Security typically replaces only a portion of pre-retirement income, so additional savings through a 401(k), IRA, or other investments are usually necessary.