Cost of Living: San Diego vs Naperville (2026)
Naperville has a 48% lower overall cost of living than San Diego as of Q1 2026. A one-bedroom apartment runs $1,650/mo in Naperville vs $2,600/mo in San Diego — a 58% difference. Naperville has a lower state income tax rate (5% vs 9.3%), which adds up over time.
- Naperville is 48% cheaper overall (COL index: 148 vs 100)
- 1BR rent: $1,650/mo in Naperville vs $2,600/mo — 37% savings
- Higher median household income: Naperville ($95,000/yr vs $88,000/yr)
- Median home price: $430,000 in Naperville vs $850,000 — 49% difference
| Category | San Diego California | Naperville Illinois |
|---|---|---|
| 🏠 HousingQ1 2026 | ||
| Studio rent/mo | $2,100 | $1,300Best |
| 1BR rent/mo | $2,600 | $1,650Best |
| 2BR rent/mo | $3,500 | $2,200Best |
| Median home price | $850K | $430KBest |
| 🛒 Food & GroceriesQ1 2026 | ||
| Groceries index (100 = US avg) | 109 | 100Best |
| Budget meal (1 person) | $18 | $14Best |
| Mid-range dinner (2) | $75 | $58Best |
| 🚌 TransportationQ1 2026 | ||
| Monthly transit pass/mo | $100 | $72Best |
| Gas price/gal | $4.40 | $3.05Best |
| Car insurance/mo | $165 | $145Best |
| ⚡ UtilitiesQ1 2026 | ||
| Monthly utilities bundle/mo | $130Best | $158 |
| Internet/mo | $65 | $62Best |
| 💰 Income & TaxesQ1 2026 | ||
| Median household income/yr | $88K | $95KBest |
| State income tax% | 9.3% | 5.0%Best |
| Sales tax (combined)% | 7.8%Best | 8.5% |
| 🎬 LeisureQ1 2026 | ||
| Movie ticket | $17.00 | $15.00Best |
| Gym membership/mo | $55 | $40Best |
| Beer at restaurant | $8.00 | $6.50Best |
| 📊 OverviewQ1 2026 | ||
| Overall COL index (100 = US avg) | 148 | 100Best |
| Walk score / 100 | 51Best | 38 |
Frequently asked questions
Is San Diego cheaper than Naperville?
No. Naperville is 48% cheaper than San Diego based on overall cost of living indices (100 vs 148, where 100 = US average).
What is the average rent in San Diego vs Naperville?
As of Q1 2026, the median 1-bedroom rent in San Diego is $2,600/month and in Naperville is $1,650/month. San Diego is more expensive by 58%.
How much do I need to earn in Naperville to match a $75,000 salary in San Diego?
To maintain a similar lifestyle, you would need approximately $50,676/year in Naperville to match a $75,000 salary in San Diego. This estimate is based on overall cost of living indices and does not account for individual spending patterns.
Which city has lower taxes — San Diego or Naperville?
Naperville has the lower state income tax rate at 5% vs 9.3%. The difference is 4.3 percentage points. Note that sales tax and local taxes also vary — see the full breakdown in the table above.
Is it worth moving from San Diego to Naperville?
It depends on your priorities. Naperville offers lower overall costs, but both cities have different job markets, weather, and lifestyle trade-offs. Use the comparison table above to evaluate rent, groceries, transportation, and income potential side by side based on your specific budget.
Data sourced from Zillow, BLS, Numbeo, Tax Foundation, and US Census ACS · Updated Q1 2026 · For general guidance only
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