Illinois vs Washington Cost of Living
Purchasing power
Your $75,000 is worth different amounts in each state
$78,947
in Illinois
$66,430
in Washington
Each cell = 1% of purchasing power. Green = value, red = gap.
Spending breakdown
Estimated annual spending on a $75,000 salary
What things actually cost
Real dollar costs side by side
Category breakdown
| Category | Illinois | Washington | Difference |
|---|---|---|---|
| Housing | 84.3 | 118.3 | -29% |
| Groceries | 99.8 | 108.0 | -8% |
| Utilities | 99.0 | 98.8 | 0% |
| Transportation | 100.5 | 124.0 | -19% |
| Healthcare | 104.1 | 110.2 | -6% |
| Dining & Misc | 98.7 | 111.2 | -11% |
| Overall | 95.0 | 112.9 | -16% |
Index values relative to national average (100). Positive difference = more expensive in Illinois.
What things actually cost
| Item | Illinois | Washington | Difference |
|---|---|---|---|
| Median home price | $260,000 | $580,000 | $320,000 |
| Average 2BR rent | $1,180/mo | $1,656/mo | $476 |
| Gas price | $3.60/gal | $4.69/gal | $1.09 |
| Electric bill | $108/mo | $90/mo | +$18 |
| Infant childcare | $16,107/yr | $20,677/yr | $4,570 |
Salary equivalent: Illinois → Washington
What a Illinois salary buys you in Washington, adjusted for cost of living.
| Salary in Illinois | Equivalent in Washington | Difference |
|---|---|---|
| $50,000 | $59,421 | $-9,421 |
| $75,000 | $89,132 | $-14,132 |
| $100,000 | $118,842 | $-18,842 |
| $150,000 | $178,263 | $-28,263 |
| $200,000 | $237,684 | $-37,684 |
Positive = your money goes further in Washington. Based on overall COL index ratio.
Based on MERIC/C2ER 2025 composite indices. Dollar amounts from AAA, EIA, Zillow, and Child Care Aware.
Overview
Washington is 16% more expensive than Illinois overall. Washington has an index of 112.9 vs 95 for Illinois (national average = 100).
FAQ
Is it cheaper to live in Illinois or Washington?
Illinois is cheaper to live in. Washington is 16% more expensive overall. The biggest driver is housing — median home prices are $260,000 in Illinois vs $580,000 in Washington.
Is Illinois cheaper than Washington?
Yes, Illinois is 16% cheaper than Washington overall based on the MERIC/C2ER cost-of-living index. Housing, groceries, and utilities all factor into the difference.
Is Washington more expensive than Illinois?
Yes, Washington is 16% more expensive than Illinois based on the MERIC/C2ER composite index. Housing is typically the largest factor in the difference.
What salary in Washington equals $100,000 in Illinois?
To maintain the same purchasing power as a $100,000 salary in Illinois, you would need approximately $118,842 in Washington. This is based on the overall cost-of-living index (95 vs 112.9).
How do housing costs compare between Illinois and Washington?
Housing is significantly cheaper in Illinois. Median home prices are $260,000 in Illinois vs $580,000 in Washington — a $320,000 difference. Average 2-bedroom rent is $1,180/mo vs $1,656/mo.
What costs more in Illinois vs Washington?
Housing is 29% lower in Illinois (index 84.3 vs 118.3). Transportation is 19% lower in Illinois (index 100.5 vs 124). Dining & Misc is 11% lower in Illinois (index 98.7 vs 111.2).
Is gas cheaper in Illinois or Washington?
Gas averages $3.60/gallon in Illinois and $4.69/gallon in Washington — a $1.09 difference per gallon.
Illinois vs Washington cost of living — how do they compare?
Illinois has an overall cost-of-living index of 95 and Washington has 112.9 (national average = 100). Washington is 16% more expensive overall. Use the calculator above to see how this affects your specific salary.
How do taxes compare between Illinois and Washington?
Cost of living is only part of the picture — state income taxes also affect your take-home pay. Use the Illinois vs Washington paycheck comparison to see how a specific salary compares after federal and state taxes, FICA, and deductions.
Where does this cost of living data come from?
Cost-of-living indices are from the MERIC/C2ER 2025 Annual Average. Dollar amounts use AAA gas prices (March 2025), EIA electricity rates (2024), Child Care Aware childcare costs (2024), Zillow home values (2024-2025), and BEA Regional Price Parities.
Related tools
- Illinois Cost of Living — Housing, groceries, gas, and more
- Washington Cost of Living — Housing, groceries, gas, and more
- Illinois vs Washington Paycheck Comparison — Compare take-home pay after taxes
- House Affordability in Illinois — How much house can you afford?
- House Affordability in Washington — How much house can you afford?
- Compare any two states
Based on MERIC/C2ER 2025 composite indices and publicly available price data. Cost of living varies significantly by metro area within a state. These are statewide averages.