LegalCostCalculator
Updated May 2026 Side-by-Side

Illinois vs South Dakota: Legal Cost Comparison (2026)

Full side-by-side breakdown of legal fees in Illinois and South Dakota — LLC formation, divorce filing, small claims limits, and notary fees.

Illinois
Cheaper LLC
South Dakota
Cheaper Divorce
South Dakota
Higher SC Limit

LLC Formation Costs: Illinois vs South Dakota

Illinois
South Dakota

Filing Fee

$150
$150

It's a tie

Annual Report

$75
$50 WIN

✓ South Dakota is cheaper here

Publication Cost

$0
$0

It's a tie

Franchise Tax

$0
$0

It's a tie

Est. Year-1 Total

$150
$150

It's a tie

Illinois: Illinois processing time can be slow — up to 10 business days for standard filing.

South Dakota: South Dakota's foreign qualification fee ($750) is one of the highest in the US — 5× the domestic fee.

Illinois: Chicago access — major market for B2B and professional services.

South Dakota: No state income tax and no personal income tax.

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Small Claims Court: Illinois vs South Dakota

Illinois
South Dakota

Max Claim Limit

$10,000
$12,000 WIN

✓ South Dakota is cheaper here

Min Filing Fee

$56
$40 WIN

✓ South Dakota is cheaper here

Contract SOL

5 yrs
6 yrs WIN

✓ South Dakota is cheaper here

Divorce Filing Costs: Illinois vs South Dakota

Illinois
South Dakota

Filing Fee

$289
$95 WIN

✓ South Dakota is cheaper here

Sheriff Service

$60
$30 WIN

✓ South Dakota is cheaper here

Children Surcharge

$0
$0

It's a tie

Notary Fees: Illinois vs South Dakota

Illinois
South Dakota

Acknowledgment

$5
$10

Jurat

$5
$10

RON Fee

$25
$10
All Legal Costs in Illinois →
Full breakdown: LLC, divorce, small claims & notary
All Legal Costs in South Dakota →
Full breakdown: LLC, divorce, small claims & notary

Frequently Asked Questions

Is Illinois or South Dakota cheaper to form an LLC?
Illinois is cheaper to form an LLC — $150 vs $150. However, consider the full first-year cost including annual report fees: Illinois year-1 total is $150 vs South Dakota at $150.
What is the LLC filing fee in Illinois vs South Dakota?
The LLC filing fee is $150 in Illinois vs $150 in South Dakota. In addition to the one-time filing fee, Illinois charges a $75 annual report fee and South Dakota charges a $50 annual report fee.
Which state is better for a small business — Illinois or South Dakota?
For most small businesses operating in one state, form your LLC in the state where you actually do business. If you operate in Illinois, form there — registering in South Dakota and then foreign-qualifying in Illinois means paying fees to both states. The "form in a cheaper state" strategy mainly benefits online businesses with no physical location.
How do divorce filing fees compare between Illinois and South Dakota?
South Dakota has lower divorce filing fees — $95 vs $289. Both states also charge for service of process ($60 in Illinois, $30 in South Dakota). You can only file divorce in a state where you or your spouse meets the residency requirement.
What is the small claims limit in Illinois vs South Dakota?
The small claims limit is $10,000 in Illinois vs $12,000 in South Dakota. South Dakota allows you to sue for more money without going to regular civil court. Filing fees are $56 in Illinois and $40 in South Dakota.