Montana Contractor License Bond— Water Well: $4,000-$25,000

Montana does not require a general contractor bond at the state level. General contractors must register with the Montana Department of Labor and Industry ($70 fee), but no bond, exam, or continuing education is needed for the registration itself. However, water well contractors must maintain a surety bond under MCA Section 37-43-306 as a condition of licensure through the DNRC Board of Water Well Contractors. Additionally, several municipalities -- including Missoula, Billings, Great Falls, Bozeman, Helena, and Whitefish -- require local contractor bonds ranging from $3,000 to $20,000 depending on the city and trade. Montana is one of the least regulated states for general contractors in the country.

Water well contractors must maintain a surety bond as a condition of licensure through the Montana Board of Water Well Contractors. Under current rules, individual contractors need a $4,000 bond. Firms with more than two licensed contractors can submit one $10,000 bond. House Bill 59 (2025) increases both amounts to $25,000.

Montana House Bill 59 (2025) increases water well contractor bond requirements from $4,000 to $25,000 for individuals and from $10,000 to $25,000 for firms. This significant increase reflects updated consumer protection standards. Check with the Board of Water Well Contractors for the effective date applicable to your license renewal.

No. A bond is required only for contractor licenses, not driller licenses. If you hold a driller's license without a contractor license, you do not need a surety bond. However, if you are both a driller and a contractor, you need the contractor bond.

Several Montana cities require local contractor bonds on top of the state registration. Missoula requires $5,000-$15,000 bonds for general, electrical, plumbing, and HVAC contractors through the City Building Division. Billings, Montana's largest city, requires $5,000-$20,000 bonds for general, mechanical, and electrical trades. Great Falls requires $3,000-$10,000 bonds with proximity to Malmstrom AFB creating government contracting opportunities. Bozeman requires $5,000-$10,000 bonds and is one of the fastest-growing cities in the state. Whitefish, a resort community, requires $5,000-$15,000 bonds with strict building standards. Helena, the state capital, requires $5,000-$10,000 bonds for general and mechanical contractors. You must register separately in each municipality where you work -- a bond in Missoula does not cover work in Billings.

The current $4,000 bond costs $40-$200 per year depending on credit. When HB 59 takes effect and the bond increases to $25,000, expect costs of $250-$1,250 per year. Cash bonds, certificates of deposit, or cashier's checks are accepted as alternatives to surety bonds.

Montana allows water well contractors to post security through several methods: a surety bond (most common), a cash bond deposited with the state, a certificate of deposit assigned to the Board, or a cashier's check. Most contractors choose a surety bond because it requires only a small annual premium rather than tying up the full bond amount.

Your Montana contractor bond renews annually through your surety company. We send renewal reminders 60 days before expiration so you have ample time to renew. If your credit has improved since the original bond, you may qualify for a lower rate at renewal. Multi-year bond terms are also available, locking in your rate for two or three years and eliminating the annual renewal process entirely.

No. A surety bond and an insurance policy serve fundamentally different purposes. The Montana contractor bond is a three-party financial guarantee between you, the state, and the surety company. If a valid claim is filed, the surety pays the claimant but you must repay the surety through indemnity. Insurance, by contrast, protects you -- the insurer absorbs the loss. Montana municipal licensing programs typically require both a bond and liability insurance. For a detailed comparison, visit our bond vs. insurance guide.