What return rate should I assume?

A common long-term planning range is 5%–8% per year depending on your asset mix. Using a conservative rate can help avoid overly optimistic projections.

How does employer match affect retirement savings?

Employer match can materially increase contributions without increasing your take-home cost. Over long time horizons, the match can compound into a large portion of your ending balance.

Should I account for inflation in retirement projections?

Yes. Inflation reduces buying power over time. You can model real returns by subtracting expected inflation from your expected investment return.

How often should I update my retirement plan?

Revisit your plan at least annually or after major life changes. Updating salary, contributions, and return assumptions keeps projections realistic.

401(k) Growth Calculator

Written by Calcida Team

Reviewed by Financial Review Process

Last updated: April 2026

Calculations are rooted in standard financial formulas and are provided as educational estimates only. They do not constitute professional financial advice. Results may vary based on actual interest rates and fees. You should verify all numbers with a certified financial professional prior to making significant financial commitments. Read our editorial commitment →

Project 401(k) balance growth over time using current balance, contributions, employer match, and expected returns.

Built specifically for people comparing financial scenarios quickly, this engine analyzes the inputs shown in the calculator to output an estimate based on standard financial math.

Context:Retirement Calculators Main Directory 401(k) Calculator: Project Your Retirement Savings Retirement Calculator: Plan Your Financial Future

Current Age

Retirement Age

Current 401k Balance ($)

Annual Salary ($)

Your Contribution (%)

Employer Match (%)

Expected Annual Return (%)

Annual Salary Increase (%)

Projected Balance at Retirement

$1,620,478

Total Contributions: $389,957

Growth Over Time

Financial Insight Placement Zone

What should you do next?

Plan your financial future with these tools:

Investment Return

Net Worth Tracker Compound Interest

How This Calculator Works

This calculator projects 401(k) growth over time by combining your current balance, ongoing contributions, employer match, and an assumed annual return rate.

Use conservative return assumptions when planning. You can also model different contribution levels to see how increasing your savings rate affects your projected retirement balance.

Financial Insight Placement Zone

Formula

This calculator uses standard financial math to estimate results from your inputs.

Example Calculation

Step 1Enter realistic values

Step 2Review the result

Calculated Outcome

Next step

Adjust one input at a time to compare scenarios

Financial Insight Placement Zone

How Compounding Drives 401(k) Growth

Over long horizons, compounding can contribute more to growth than new contributions. Staying invested and keeping fees low can have a meaningful impact on long-term outcomes.

Common Questions

Financial Insight Placement Zone

Continue Your Analysis

401(k) Calculator: Project Your Retirement SavingsCalculate now →Retirement Calculator: Plan Your Financial FutureCalculate now →Compound Interest Calculator: Grow Your WealthCalculate now →Inflation Calculator: Buying Power Over TimeCalculate now →FIRE Calculator (Financial Independence)Calculate now →Mortgage Payment Calculator with Taxes and InsuranceCalculate now →

Toolkit

Financial Insight Placement Zone