Trades by State
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Indiana contractor license requirements

What you need before your first paid job in Indiana, one page for each trade. The license, the least insurance you must carry, whether the state asks for a bond, when you charge sales tax, and the deadlines that protect your right to be paid.

Checked by the Trades by State editor on 2026-09-26Every figure on these pages links to the official page it came fromSomething wrong? Tell us

Plumbing in Indiana

License you need
Plumbing ContractorRenews every two years
Insurance you must carry
No state minimumcustomers usually ask for $1,000,000
Workers' comp
Requiredas soon as you have an employee
  • Plumbing is the odd one out in Indiana. The state licenses plumbers through the Indiana Plumbing Commission, but it has no state license for HVAC or electrical work.
  • The first license is half price in an odd year. A plumbing contractor pays $100 in an even year and $50 in an odd year, because everyone renews together before 1 December of odd years.

HVAC in Indiana

License you need
Heating and Cooling Contractor, Air Conditioning A (Indianapolis)Renews every two years
Insurance you must carry
$500,000plus $100,000 for property damage
Workers' comp
Requiredas soon as you have an employee
  • Indiana has no state HVAC license, no state exam and no state license number. Your city or county decides, so a license that works in Indianapolis may mean nothing one county over.
  • Indianapolis sorts its HVAC licenses by size. Air Conditioning D stops at 5 tons of cooling, B stops at 25 tons, and A has no limit.

Electrical in Indiana

License you need
Master Electrical Contractor (Indianapolis)Renews every two years
Insurance you must carry
$500,000plus $100,000 for property damage
Workers' comp
Requiredas soon as you have an employee
  • The City of Indianapolis puts it in one line on its own form. There is not a state electrical license, and each local government decides for itself.
  • Indianapolis wants six years of electrical construction work before you can sit the Master exam. College courses or a finished apprenticeship can stand in for two of them at most.

Across states

Can you charge sales tax on labor? The rule in 25 states. Which states tax the work itself, which tax only the parts, and how a repair differs from a new install.