Find Your Retirement Savings Gap Using Only Your Paystub
Quick answer: Multiply your gross pay per check by your pay periods to get yearly income. Aim to replace about 75% of it, subtract an estimated Social Security benefit, and multiply what is left by 25. Compare that target with what your current savings and paycheck contributions could grow to. The difference is your estimated gap.↗ Share on X
To estimate your retirement savings gap from a paystub, do this: multiply your gross pay per check by your number of pay periods, aim to replace about 75% of that income, subtract an estimated Social Security benefit, and multiply what is left by 25. That is your rough target. Then compare it with what your current balance and paycheck contributions could grow to. The difference is your gap.
It takes about 15 minutes and a calculator. It will not be exact. No retirement math is. But it turns a vague worry into one number you can act on.
This article is general education, not personal financial advice. Investment returns are never certain, and you can lose money.
What do you need before you start?
401(k), HSA or Roth IRA? The Order to Fund Them First →
Which Retirement Account to Fund First: A 5-Step Order →
Risk Tolerance Changed? How to Rebalance Without Panic →You need one recent paystub, a calculator, and one number the paystub usually does not show: your current retirement account balance. You can find that on your 401(k) website or on your last statement.
On the paystub, look for these lines. Names vary by employer.
| What to find | What it may be called | Why it matters |
|---|---|---|
| Gross pay this period | Gross, Total Earnings | Your income before taxes |
| Pay frequency | Pay Period dates | Tells you how many checks per year |
| Your 401(k) money | 401K, 403B, RSP, Roth 401K | What you save now |
| Employer's money | ER Match, Company Contribution | Free money toward retirement, if offered |
| Social Security tax | OASDI, FICA-SS | Shows you are earning Social Security credit |
If your hours or commissions change a lot, use the year-to-date gross, often shown as YTD. Divide it by the number of checks you have received this year. That gives you a fairer average than one unusual check.
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How do you turn a paystub into a target number?
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This content is informational and is not investment advice or financial consulting.
Follow these six steps. We will use one example worker the whole way, so you can see the math. The example is made up. Put your own numbers in place of these.
Our example: age 37, wants to retire at 67, paid every two weeks, gross pay of $2,000 per check, $120 per check going to a 401(k), employer adding 3% of pay, and a current balance of $30,000.
Step 1: Find your yearly income. Multiply gross pay by your checks per year. Weekly is 52. Every two weeks is 26. Twice a month is 24. Monthly is 12.
Example: $2,000 × 26 = $52,000.
Step 2: Pick an income goal. Many planners use 70% to 80% of your working income as a starting point. The idea is that you stop paying payroll taxes, you stop saving, and some work costs go away. If you expect a paid-off house, you might need less. If you expect big medical bills, you might need more.
Example: 75% of $52,000 = $39,000 a year.
Step 3: Subtract estimated Social Security. The Social Security Administration says the program replaces about 40% of pre-retirement income for an average earner. Higher earners usually get a smaller share, and lower earners a larger one. The better number is your own estimate, which is free at ssa.gov with a my Social Security account. Use that if you can.
Example: 40% of $52,000 = $20,800. So $39,000 − $20,800 = $18,200 a year that your savings would need to cover.
Step 4: Multiply by 25. This comes from the "4% rule," a planning shortcut. It says that pulling out about 4% of your savings in the first year, then adjusting for inflation, has held up in many past market periods over 30 years. Past results may not repeat. Still, it gives you a place to start.
Example: $18,200 × 25 = $455,000. That is the target, in today's dollars.
Step 5: Add up what you are saving now. Add your own contributions and your employer's for the year.
Example: $120 × 26 = $3,120 from the worker. 3% of $52,000 = $1,560 from the employer. Total: $4,680 a year.
Step 6: Estimate where you could end up, and find the gap. Use the table below. It assumes your money grows 4% a year after inflation. That is an assumption for planning, not a forecast. Real returns go up and down, and some years are negative.
| Years until retirement | Multiply current balance by | Multiply yearly savings by |
|---|---|---|
| 10 | 1.48 | 12.01 |
| 15 | 1.80 | 20.02 |
| 20 | 2.19 | 29.78 |
| 25 | 2.67 | 41.65 |
| 30 | 3.24 | 56.08 |
| 35 | 3.95 | 73.65 |
| 40 | 4.80 | 95.03 |
Example, with 30 years to go:
- Current balance: $30,000 × 3.24 = about $97,300
- Yearly savings: $4,680 × 56.08 = about $262,500
- Estimated total: about $359,800
- Gap: $455,000 − $359,800 = about $95,200
How much more per paycheck could close the gap?
Index Funds Explained: How They Work and How to Start →
Accumulating vs Distributing Index Funds: Which to Pick →
First Index Fund: A 4-Step Way to Choose Without the Stress →Divide the gap by the "yearly savings" number in the table. Then divide by your checks per year.
Example: $95,200 ÷ 56.08 = about $1,698 a year. Then $1,698 ÷ 26 = about $65 per check.
That is a little over 3% of the example worker's gross pay. If that money goes into a traditional pre-tax 401(k), take-home pay usually drops by less than $65, because federal income tax goes down too. Your paystub will show the real change after the first check.
What if the gap looks impossible?
A big number is not a verdict. It tells you which levers to pull. Here are the main ones, starting with the easiest for most people.
1. Get the full employer match first. If your plan matches and you are not contributing enough to get all of it, you are leaving part of your pay on the table. Ask human resources for the formula.
2. Raise your contribution 1% at a time. A 1% change is often small enough that you adjust. Many plans let you set an automatic yearly increase. Tie it to your raise.
3. Work a little longer. Each extra year gives your money more time, and it means one less year of spending. Claiming Social Security later also raises your monthly benefit, up to age 70.
4. Plan to spend less. Dropping the goal from 75% to 70% in the example lowers the target by $65,000. Only do this if it is realistic for your life.
5. Check your fund fees. Look at your 401(k) fund list for the "expense ratio." It is the yearly fee, shown as a percent. Lower fees leave more of your money invested. A plain index fund, which simply tracks a big slice of the market, often has one of the lowest fees in the plan.
Do not start with risky bets to "catch up." Chasing fast gains is how many people turn a small gap into a large one.
What can make this estimate wrong?
Be honest with yourself about what the math leaves out.
- Spouse or partner income. Run the numbers as a household if you share expenses, and include both Social Security estimates.
- Other accounts. Add IRAs, old 401(k)s, and pensions to your current balance. Do not count your home unless you truly plan to sell it.
- Debts. Credit card interest can cost more than investments are likely to earn. High-rate debt may need attention first.
- Health costs. Medicare starts at 65 for most people, and it does not cover everything.
- Uneven pay. If you are self-employed or get big bonuses, a single stub will mislead you. Use last year's tax return for income.
- Social Security changes. Benefits can change by law. That is one more reason not to treat this number as fixed.
When should you talk to a professional?
Talk to a professional if your numbers are complicated, you are within about 10 years of retiring, you have a pension or a large inheritance, or you are thinking about pulling money from a retirement account. A fee-only fiduciary adviser is paid by you, not by commissions, and must put your interests first. Ask them to say in writing how they are paid. Many employers also offer free financial counseling through the 401(k) provider.
Your next step
Before your next payday, pull up your latest paystub and do Steps 1 through 6 on one sheet of paper. Then log in to your 401(k) site and raise your contribution by 1%, or by whatever it takes to get your full employer match. Write today's gap and the date at the top of the page. Do the same math again in 12 months and compare.
FAQ
What if my paystub does not show my employer match?
Many paystubs leave it out. Log in to your 401(k) website or ask human resources for the match formula. A common setup is a partial match up to a set percent of your pay, but yours may differ, so use your plan's real numbers.
Is 25 times the right number for everyone?
No. It comes from the 4% rule of thumb, which is a planning shortcut and not a promise. People who retire early, have high health costs, or want more safety may need more. Treat 25 times as a starting estimate.
How often should I redo this math?
Once a year is enough for most people, and also after a raise, a job change, a new child, or a big change in your debts. Keep each year's numbers so you can see whether the gap is shrinking.
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Educational content, not personalized financial advice. Sources cited where applicable.