8 categories · Weighted avg · Break-even raise

inflationcost-of-livingbudgetingsalarycpipersonal finance

//// Financial · Budgeting

Personal Inflation Calculator

The CPI is an average. Your inflation is personal. Enter your actual spending to see your real cost-of-living increase — and the raise you need just to stay even.

401(k) Limit 2024$23,000(+$7,500 catch-up 50+)

Roth IRA Limit$7,000(MAGI phase-out applies)

S&P 500 Avg Return~10%/yr(nominal, historical)

Your Income

Current gross annual income

Official CPI for comparison

Monthly Spending — Last Year vs This Year

Enter your average monthly cost. Leave at 0 if it doesn't apply to you.

Category	Last Year/mo	This Year/mo
Housing (rent/mortgage)+10.0%	$	$
Groceries+10.0%	$	$
Transportation (gas, insurance)+8.9%	$	$
Healthcare & insurance+11.4%	$	$
Utilities+7.5%	$	$
Dining out+6.7%	$	$
Software & subscriptions+16.7%	$	$
Professional services+10.0%	$	$

9.82%

Your personal inflation rate vs official CPI of 3.2%

Your personal inflation is 6.6 percentage points above the official CPI — the headline number understates your cost-of-living increase.

Personal Inflation

9.82%

Official CPI: 3.2%

Annual Cost Increase

$4,620

vs last year's spending

Break-Even Raise

$10,804

Just to maintain lifestyle

Raise Needed

+9.82%

To break even on inflation

Break-Even Income

To maintain your current lifestyle, you need to earn $120,804 this year — that's $10,804 more than your current $110,000.

Biggest Driver of Your Inflation

Housing (rent/mortgage)

$1,800/mo → $1,980/mo

+10.0%

$2,160/yr more

Category Breakdown

Housing (rent/mortgage)+10.0%(46% of spend)

Groceries+10.0%(15% of spend)

Transportation (gas, insurance)+8.9%(11% of spend)

Healthcare & insurance+11.4%(9% of spend)

Utilities+7.5%(5% of spend)

Dining out+6.7%(8% of spend)

Software & subscriptions+16.7%(3% of spend)

Professional services+10.0%(3% of spend)

Spending weights per category

weight_i = annual_spend_i ÷ total_annual_spend

Total last year: $47,040/yr

= Housing (rent/mortgage): 45.9% · Groceries: 15.3% · Transportation (gas, insurance): 11.5% · ...

Categories with higher weights drive your inflation rate more — a 10% rent increase hurts more than a 10% coffee increase because rent is a larger share of spending.

Price change per category

pct_change_i = (this_year_i − last_year_i) ÷ last_year_i × 100

= Housing (rent/mortgage): +10.0% · Groceries: +10.0% · Transportation (gas, insurance): +8.9% · Healthcare & insurance: +11.4%

Biggest driver: Housing (rent/mortgage) at +10.0% — contributing 4.59 pp to your total inflation rate.

Personal inflation rate (weighted average)

personal_inflation = Σ(weight_i × pct_change_i)

45.9% × 10.0% + 15.3% × 10.0% + 11.5% × 8.9%

= 9.82% personal vs 3.2% CPI

Your inflation is 6.62 pp above official CPI. CPI is a national average — your actual basket differs significantly based on housing market, car ownership, and diet.

BLS CPI methodology — weighted geometric mean of price changes across spending categories

Dollar cost of your inflation

dollar_inflation = total_this_year − total_last_year

$51,660/yr − $47,040/yr

= +$4,620/yr ($385/mo more)

You're spending $4,620 more per year for the same lifestyle. That's $385/month of purchasing power lost to price increases.

Break-even raise needed

break_even_raise = income × personal_inflation_rate

$110,000 × 9.82%

= $10,804/yr (9.82% raise)

A raise below this amount is a real pay cut — you're falling behind inflation even if your nominal salary increased.

Real wage growth (after inflation)

real_growth = actual_raise% − personal_inflation%

9.82% break-even raise − 9.82% inflation

= +0.00% real gain

Your break-even raise of 9.8% beat inflation by 0.00 pp — purchasing power held or grew.

Purchasing power loss over 5 years at this rate

loss_5yr = income × (1 − (1+r)^−5)

$110,000 × (1 − (1 + 0.0982)^−5)

= $41,142 in purchasing power eroded

If your inflation rate stays at 9.8% for 5 years, your $110,000 income will feel like $68,858 in today's dollars — a 37.4% loss in real value.

Key insight

The official CPI is a basket of goods averaged across all American households. Your actual inflation depends on your spending mix. If housing is 50% of your budget and rents rose 10%, your personal inflation is much higher than a retiree whose biggest expense is healthcare. "The CPI is up 3.2%" tells you nothing about your actual purchasing power loss — only your own numbers do.

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Financial Snapshot →Break-Even Analysis →Annual Review →

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