How It Works

Savings rate measures what fraction of your income goes toward savings and investments rather than spending. It’s worth knowing that many in the FIRE community consider this the single most impactful number to track - it affects both how much you accumulate and how much you need.

Syntax

=(income - expenses) / income

Format as percentage.

Example

Monthly Numbers:

Gross Income: $7,500
Total Expenses (including taxes): $5,250
Amount Saved: $2,250

Formula: =(7500-5250)/7500

Result: 30% savings rate

Two Common Approaches

Gross Savings Rate

Uses pre-tax income as the denominator:

=total_saved / gross_income

Useful to consider when comparing against FIRE benchmarks, since most published tables use gross.

Net (After-Tax) Savings Rate

Uses take-home pay:

=total_saved / net_income

Some people find this more intuitive since it reflects what you actually control.

Example comparison:

Gross income: $90,000
Taxes: $20,000
Net income: $70,000
Total saved: $27,000

Method	Calculation	Result
Gross rate	$27,000 / $90,000	30%
Net rate	$27,000 / $70,000	38.6%

Savings Rate Benchmarks

Savings Rate	Interpretation
0-5%	Minimal - barely ahead of expenses
5-10%	Below average - matches the typical U.S. household
10-15%	Standard retirement advice range
15-25%	Above average - on a solid path
25-40%	Strong - early retirement becomes feasible
40-50%	Aggressive - FIRE in roughly 15-20 years
50%+	Very aggressive - FIRE in under 15 years

What Counts as Savings?

Include:

401(k) / 403(b) contributions
IRA contributions
Employer match (if using gross method)
Taxable investment contributions
Extra debt principal payments (above minimums)
HSA contributions used for investing

Typically exclude:

Minimum debt payments (those are expenses)
Emergency fund deposits (some include, some don’t)
Home equity buildup from mortgage payments (debated)

Setting Up a Savings Rate Tracker

A	B	C
Income
Salary (gross)	$7,500
Side Income	$500
Total Income	=SUM(B2:B3)
Savings
401(k)	$1,500
Roth IRA	$500
Taxable Investing	$300
Total Saved	=SUM(B6:B8)
Savings Rate	=B9/B4

Variations

Rolling 3-Month Average

Smooths out lumpy months:

=AVERAGE(month1_rate, month2_rate, month3_rate)

Annual Savings Rate

Better for people with irregular income:

=SUM(all_monthly_savings) / SUM(all_monthly_income)

Savings Rate with Employer Match

=(your_contributions + employer_match) / (gross_income + employer_match)

Pro Tips

Monthly tracking provides the clearest picture of savings rate trends
Automatic transfers on payday are one approach to maintaining consistency
Some people save a portion of each raise to maintain lifestyle stability
Pick one method and stick with it - gross vs. net doesn’t matter as long as you’re consistent over time
Pair with the 50/30/20 rule - 50% needs, 30% wants, 20% savings is a common starting framework

Common Errors

Mixing gross and net - comparing a net savings rate to a gross benchmark overstates progress
Forgetting employer match - if you include match in savings, add it to income too
Counting debt minimum payments as savings - minimums keep you current, they don’t build wealth
Ignoring irregular expenses - annual insurance premiums or holiday spending can tank a monthly rate

Savings Rate