C
FinanceFree

Pension Calculator

Project your retirement savings future value based on a current balance, monthly contributions, expected annual return, and years until withdrawal. This calculator uses the compound interest formula with monthly compounding to show how consistent saving and market growth can build wealth over time. Works for 401(k), IRA, RRSP, superannuation, and any defined-contribution retirement plan.

Enter Values

Result

Enter values above and click Calculate to see your result.

AI Assistant

Ask about this calculator

I can help you understand the pension calculator formula, interpret your results, and answer follow-up questions.

Try asking

Formula

FV = PV(1+r)^n + PMT x (((1+r)^n - 1) / r) where r = monthly rate and n = total months.

The formula has two components: the future value of your existing balance (compound growth on the lump sum) and the future value of an annuity (compound growth on each monthly contribution). Both use the monthly interest rate (annual rate / 12) and the total number of months (years x 12). The combined result shows your projected balance at retirement.

Worked Example

Current balance $10,000, contributing $300/month, 7% annual return, 20 years: Step 1: Monthly rate = 7% / 12 = 0.5833% Step 2: Total months = 20 x 12 = 240 Step 3: FV of existing balance = $10,000 x (1.005833)^240 = $40,387 Step 4: FV of monthly contributions = $300 x ((1.005833)^240 - 1) / 0.005833 = $156,388 Step 5: Total projected balance = $40,387 + $156,388 = $196,775 Step 6: Total contributed = $10,000 + ($300 x 240) = $82,000 Step 7: Growth from returns = $196,775 - $82,000 = $114,775

Frequently Asked Questions

Is the projected return guaranteed?

No. This calculator uses a steady annual return rate for projection purposes. Actual market returns fluctuate yearly and can be negative in some years. The 7% default is a commonly used long-term average for diversified stock portfolios (after inflation adjustment). Your actual results will vary based on market conditions and asset allocation.

Does this account for taxes, fees, or inflation?

No. The projection is pre-tax and pre-fee. To approximate after-fee returns, reduce the annual return by your expense ratio (e.g., use 6.5% instead of 7% if fees are 0.5%). For inflation-adjusted projections, use a real return rate (e.g., 4% to 5% instead of 7%).

How do I include employer matching contributions?

Add your employer match to the monthly contribution field. For example, if you contribute $300/month and your employer matches 50%, enter $450/month as the total. Only include the match if it is fully vested.

Which retirement accounts does this work for?

This calculator works for any defined-contribution retirement account: US 401(k) and IRA, Canadian RRSP, Australian superannuation, UK workplace pensions, and similar plans worldwide. The math is the same; only the tax treatment and contribution limits differ by country.

Why does the growth accelerate in later years?

Compound interest creates exponential growth. In early years, most of the balance comes from your contributions. In later years, the returns on your existing balance (which has grown large) generate more growth than your monthly contributions. This is why starting early has such a powerful effect on retirement savings.

Related Calculators

Compound Interest CalculatorLoan Calculator

More Finance Calculators

View all

Simple Interest Calculator

Calculate simple interest on loans or investments.

Compound Interest Calculator

See how your investments grow over time.

ROI Calculator

Measure the return on your investments.

Loan EMI Calculator

Calculate loan EMI and see amortization charts.

Explore Other Categories

Secure and Private

All calculations run locally. Your financial data never leaves your browser.

Precise Financial Calculations Powered by Calculory AI