Your savings percentage (also called your savings rate) is simply the portion of your income that you keep rather than spend. The basic formula is: total savings divided by total income, multiplied by 100. Where it gets interesting is deciding what counts as “savings” and which version of “income” to use as your starting point.
The Basic Formula
At its core, the calculation looks like this:
- Savings Rate = (Total Savings ÷ Total Income) × 100
If you earn $5,000 a month and save $1,000, your savings rate is 20%. The tricky part is that “total savings” and “total income” can each be measured in different ways, which changes the result. Neither version is wrong, but you should pick one method and stick with it so you can track your progress over time.
Gross Income vs. Net Income
The biggest variable in the formula is the denominator: do you divide by gross income or net income?
Gross income is your total pay before taxes, health insurance premiums, and other payroll deductions. Using gross income as the denominator gives you a lower, more conservative savings rate because you’re measuring against a larger number. This method is straightforward if you’re salaried, since your gross pay is right on your pay stub.
Net income (after-tax income) is what actually lands in your bank account plus any pre-tax savings you directed elsewhere. A common formula for this approach is:
- Savings Rate = (After-Tax Savings + Pre-Tax Savings) ÷ (Take-Home Pay + Pre-Tax Savings) × 100
This version strips taxes out of both sides of the equation, giving you a clearer picture of how much of your spendable money you’re actually keeping. The resulting percentage will be higher than the gross method because the denominator is smaller.
Here’s how the two compare. Say you earn $6,000 per month gross, pay $1,200 in taxes, contribute $500 to a pre-tax 401(k), and put $300 into a regular savings account. Your total savings is $800.
- Gross method: $800 ÷ $6,000 = 13.3%
- Net method: $800 ÷ ($4,300 take-home + $500 pre-tax) = $800 ÷ $4,800 = 16.7%
Same person, same month, two different numbers. Most personal finance discussions use the net method because it reflects choices you actually control. You can’t choose to not pay income tax, so measuring against gross income penalizes you for something outside your power.
What Counts as Savings
Savings is any money you keep rather than spend on consumption or obligations. That sounds simple, but a few categories deserve a closer look.
Retirement contributions are savings, whether they go to a 401(k), 403(b), IRA, or similar account. Even though this money gets invested in stocks or bonds, it’s still money you chose not to spend. Include the full amount of your pre-tax and after-tax retirement contributions in the numerator.
Employer matches are a judgment call. If your employer contributes $1,800 per year to your 401(k) on top of your own contributions, that money is real and it’s growing for you. Some people include it to get a complete picture of how much wealth they’re building. Others leave it out because it doesn’t represent a sacrifice from their own paycheck. If you include an employer match, add the same amount to the income side of the equation so you don’t inflate your rate. For example, if your take-home is $4,000, your own 401(k) contribution is $500, and your employer match is $250, you’d calculate ($750) ÷ ($4,000 + $500 + $250).
Emergency fund deposits, brokerage account transfers, and money set aside for a down payment, college fund, or other goal all count. If the money leaves your checking account and goes somewhere you intend to keep it, it’s savings.
Debt principal payments are where opinions split. Paying down the principal on a mortgage or student loan increases your net worth, which looks a lot like saving. But paying the minimum on a credit card while carrying a balance is really just meeting an obligation. A reasonable approach: count extra payments above the minimum as savings, since those are a deliberate choice to build equity or reduce debt faster. Don’t count minimum required payments.
Things that are not savings: taxes, insurance premiums, rent, groceries, subscriptions, interest payments on debt. These are all costs of living, not money you’re keeping.
A Step-by-Step Example
Let’s walk through a full monthly calculation using the net income method.
- Gross monthly salary: $7,000
- Pre-tax 401(k) contribution: $700
- Federal and state taxes withheld: $1,400
- Health insurance premium: $200
- Take-home pay (direct deposit): $4,700
- Transfer to savings account: $400
- Extra student loan payment (above minimum): $200
- Roth IRA contribution: $300
First, add up total savings: $700 (401k) + $400 (savings account) + $200 (extra loan payment) + $300 (Roth IRA) = $1,600.
Next, calculate your adjusted income: $4,700 (take-home) + $700 (pre-tax 401k) = $5,400. You add the 401(k) back in because it’s money you earned but redirected before it hit your bank account.
Finally, divide: $1,600 ÷ $5,400 = 0.296, or about 29.6%.
Notice the health insurance premium and taxes don’t show up on either side. They’re costs that reduce your gross pay but aren’t savings and aren’t part of your spendable income.
Pre-Tax and After-Tax Savings Aren’t Equal
A dollar in a pre-tax 401(k) and a dollar in a Roth IRA don’t have the same spending power in retirement. Pre-tax money will be taxed when you withdraw it. If you withdraw $10,000 from a traditional 401(k) and your tax rate at that point is 25%, you’ll keep $7,500. Roth withdrawals, on the other hand, come out tax-free because you already paid taxes before contributing.
For the purpose of calculating your savings rate today, most people treat a pre-tax dollar and an after-tax dollar as equal. The formula is already complicated enough without projecting future tax rates. But it’s worth knowing that a 30% savings rate built entirely from pre-tax contributions represents slightly less future spending power than the same rate built from Roth contributions.
How Often to Calculate
Monthly is the most useful frequency. Your income and expenses fluctuate, and a monthly check lets you spot changes quickly. If your income is irregular (freelance, commission-based, seasonal), a rolling three-month or six-month average smooths out the ups and downs and gives you a more honest picture.
To make the math easy, set a recurring calendar reminder. Pull your bank and retirement account statements, add up everything that qualifies as savings, divide by your adjusted income, and write it down. A simple spreadsheet with columns for month, total savings, total income, and savings rate is all you need. Over time, you’ll see trends that are more useful than any single month’s number.
What a Good Savings Rate Looks Like
The commonly cited benchmark is 20% of after-tax income, a guideline rooted in the popular 50/30/20 budgeting framework (50% needs, 30% wants, 20% savings). That’s a solid target for most people building toward a traditional retirement timeline.
If you’re starting from zero, even 5% or 10% is meaningful. The goal is to establish the habit and increase the percentage over time as raises come in or expenses drop. People aiming for early retirement often target 40% to 60% or higher, because a higher savings rate both accelerates the money you’re accumulating and proves you can live on less, which means you need a smaller nest egg to sustain your lifestyle.
Whatever your target, the number only matters if you measure it consistently. Pick your formula, track it monthly, and let the trend guide your decisions.