Cost of Living Comparison Between O'Fallon, IL and Chiang Mai Cost of Living Comparison Between O'Fallon, IL and Chiang Mai

Monthly Cost of Living

A single person spends $2,591 per month in O'Fallon, IL vs $866 in Chiang Mai, rent included.

A couple spends around $3,815 per month in O'Fallon, IL vs $1,351 in Chiang Mai, rent included.

A family of three spends $5,038 per month in O'Fallon, IL vs $1,835 in Chiang Mai, rent included.

O'Fallon, IL costs about 199% more than Chiang Mai, driven mainly by Eating Out.

O'Fallon, IL sits 93% above the global median, while Chiang Mai is 35% below – they fall on opposite sides of the world average.

Meal at Budget Restaurant

$20.34 $20.34

$1.94 ฿63.8

948.45%

Three-Course Dinner for Two, Mid-Range

$69.1 $69.1

$18.64 ฿611

270.49%

Fast Food Meal (McDonalds, etc)

$11.11 $11.11

$7.82 ฿256

42.07%

Cappuccino

$4.95 $4.95

$1.95 ฿64.1

153.85%

Coke/Pepsi/Fanta/Sprite (0.33 liter bottle)

$2.42 $2.42

$0.85 ฿27.90

184.71%

Water (0.33 liter bottle)

$1.96 $1.96

$0.35 ฿11.64

460.00%

Local Beer (0.5 liter draught)

$4.90 $4.90

$2.13 ฿69.9

130.05%

Imported Beer (0.33 liter bottle)

$6.60 $6.60

$3.73 ฿122

76.94%

Milk (1 liter)

$0.78 $0.78

$1.71 ฿56.2

-54.39%

White Bread (500g)

$2.63 $2.63

$1.63 ฿53.4

61.35%

Rice (white) (1kg)

$5.61 $5.61

$1.14 ฿37.32

392.11%

Eggs

$2.81 $2.81

$1.93 ฿63.4

45.60%

Local Cheese (1kg)

$8.56 $8.56

$16.21 ฿532

-47.19%

Chicken Fillets (1kg)

$7.80 $7.80

$3.12 ฿102

150.00%

Beef Round Steak (1kg)

$16.37 $16.37

$10.90 ฿357

50.18%

Apples (1kg)

$6.94 $6.94

$2.75 ฿90.4

152.36%

Banana (1kg)

$2.28 $2.28

$1.21 ฿39.70

88.43%

Oranges (1kg)

$5.60 $5.60

$1.62 ฿53.2

245.68%

Tomato (1kg)

$4.12 $4.12

$1.59 ฿52.1

159.12%

Potato (1kg)

$3.99 $3.99

$1.40 ฿45.91

185.00%

Onion (1kg)

$3.93 $3.93

$1.17 ฿38.34

235.90%

Lettuce (1 head)

$2.06 $2.06

$0.66 ฿21.70

212.12%

Water (1.5 liter bottle)

$2.33 $2.33

$0.53 ฿17.30

339.62%

Cigarettes 20 Pack (Marlboro, Camel)

$6.92 $6.92

$4.69 ฿154

47.55%

Wine (Bottle)

$14.81 $14.81

$18.66 ฿612

-20.63%

Local Beer (0.5 liter bottle)

$1.89 $1.89

$1.80 ฿59.0

5.00%

Imported Beer (0.33 liter bottle)

$3.96 $3.96

$3.23 ฿106

22.60%

One-way Ticket (Public Transport)

$2.04 $2.04

$0.90 ฿29.39

126.67%

Public Transport Monthly Pass (Regular Price)

$19.21 ฿630

Taxi Start (Normal Tariff)

$3.44 $3.44

$1.41 ฿46.13

143.97%

Taxi (Normal Tariff) (1km)

$1.57 $1.57

$1.29 ฿42.31

21.71%

Taxi 1hour Waiting (Normal Tariff)

$39.52 $39.52

$7.84 ฿257

404.08%

Gasoline (1 liter)

$0.85 $0.85

$1.27 ฿41.77

-33.07%

Midsize Hatchback 1.4l (Volkswagen Golf, Toyota Prius, Honda Civic, etc)

$29.7K $29.7K

$21.3K ฿698.1K

39.80%

Compact Sedan 1.6l (Toyota Corolla, Mazda3, Kia K4, Hyundai Elantra, etc)

$25.2K $25.2K

$22.2K ฿728.8K

13.50%

Utilities for 2 People in 2-bedroom Apartment (Heating, Electricity, Gas, Water, Garbage) (85m2)

$239 $239

$69.1 ฿2,266

246.05%

SIM Card Monthly Plan (Calls and 10GB+ Data)

$52.6 $52.6

$14.08 ฿462

273.51%

Internet (50+ Mbps, Unlimited Data)

$68.8 $68.8

$18.00 ฿591

282.33%

Gym Membership (Monthly)

$42.50 $42.50

$41.06 ฿1,347

3.51%

Tennis Court (1 Hour on Weekend)

$6.96 ฿228

Cinema Ticket

$13.20 $13.20

$5.92 ฿194

122.97%

Preschool or Kindergarten, Full Day, Private, 1 Child (Monthly)

$667 $667

$299 ฿9,811

123.20%

International Primary School, 1 Child (Yearly)

$23.9K $23.9K

$15.0K ฿490.6K

59.67%

Jeans (Levis 501 Or Similar)

$51.7 $51.7

$54.7 ฿1,795

-5.52%

Summer Dress (H&M, Zara, etc)

$40.75 $40.75

$26.77 ฿878

52.22%

Sport Shoes (Adidas, Nike)

$75.0 $75.0

$85.0 ฿2,788

-11.71%

Men's Leather Business Shoes

$121 $121

$70.6 ฿2,316

71.32%

1-bedroom Apartment, City Center (Monthly)

$1,608 $1,608

$428 ฿14.0K

275.47%

1-bedroom Apartment, Outside City Center (Monthly)

$1,332 $1,332

$237 ฿7,787

461.18%

3-bedroom Apartment, City Center (Monthly)

$2,599 $2,599

$801 ฿26.3K

224.33%

3-bedroom Apartment, Outside City Center (Monthly)

$2,248 $2,248

$515 ฿16.9K

336.04%

Buy Apartment in City Center (m2)

$3,005 $3,005

$1,975 ฿64.8K

52.21%

Buy Apartment Outside City Center (m2)

$2,260 $2,260

$1,475 ฿48.4K

53.24%

Average Monthly Net Salary (After Tax)

$617 ฿20.3K

20-Year Fixed Mortgage Interest Rate (Annual %)

6.49

29.80%

CityCost data is based on AI and user input – minor inaccuracies may occur.

Last update for O'Fallon, IL: June 1, 2026

Last update for Chiang Mai: May 31, 2026

Cost Breakdown

A central one-bedroom costs $1,608 in O'Fallon, IL versus $428 in Chiang Mai. Rent is usually the largest line item in a monthly budget, so the gap here sets the tone for the overall comparison.

A mid-range dinner for two costs $69.0 in O'Fallon, IL versus $19.00 in Chiang Mai. Monthly groceries follow the same trend: $376 vs $246 – making Chiang Mai the more affordable choice for daily food spending.

City Median Internet Speeds Comparison (Updated April 2026)

The chart highlights the Precision Threshold for mobile and fixed broadband internet speeds, updated quarterly.

Digital Nomad Cost of Living Index

O'Fallon, IL vs Chiang Mai: Cost of Living - Frequently Asked Questions

O'Fallon, IL costs about 199% more than Chiang Mai, with the gap driven mainly by Eating Out. That's enough to noticeably affect everyday spending and lifestyle for anyone choosing between the two.

For a comfortable life, plan on about $3,887 per month in O'Fallon, IL and $1,300 in Chiang Mai. That covers rent, food, utilities, transport, and enough left over to feel settled – not just surviving.

Rent is clearly cheaper in Chiang Mai, especially for central apartments. Housing is actually the single biggest factor behind the overall cost gap between these two cities.

A mid-range dinner for two costs $69.0 in O'Fallon, IL and $19.00 in Chiang Mai. That's a good indicator of the overall restaurant and café pricing gap between the two cities.

Groceries cost about 53% more in O'Fallon, IL, though it depends on what you buy. Local produce may be comparable; imported and premium items show the biggest price gap.

A $1,000 monthly budget goes further in Chiang Mai, where all-in costs run around $866, than in O'Fallon, IL at $2,591. In Chiang Mai it covers expenses comfortably, while in O'Fallon, IL it requires careful planning or may not stretch far enough.

For digital nomads, it depends on budget. Chiang Mai costs $866 versus $2,591 in O'Fallon, IL. Both have workable remote work infrastructure, but the cost gap matters when income varies month to month.

Both have safer and rougher neighborhoods, but overall safety is comparable to other large cities. Neighborhood choice matters more than the city-level comparison – central, well-trafficked areas feel secure in both.

If budget matters most, go with Chiang Mai. If higher salaries, better infrastructure, or specific career opportunities are the priority, O'Fallon, IL makes more sense. Both are solid long-term options with distinct trade-offs.