How to Choose a Bookkeeper in Montana (2026)

Choosing a bookkeeper in Montana comes down to three checks you can do in an afternoon: the firm's registration, any CPA license it claims, and a written fee with a close date. The third is the one most Montana firms leave to a call, since only 3 of the 18 we list put a price on their sites.

What a Montana bookkeeper keeps track of

These are the state filings your books feed in Montana. Which ones apply depends on your entity type, what you sell, whether you have employees and the schedule each agency assigns. It's general information, not tax advice. The bookkeeper keeps the records; you, or whoever your engagement letter names, file.

• No general sales tax. Montana has no general sales tax, so there's no state sales tax return to file. A Montana business selling online to buyers in a state that requires online retailers to collect sales tax still has to collect and pay that state's tax. Source: Montana Department of Revenue, checked September 26, 2026.
• Wage withholding. All new Montana withholding accounts start on the monthly schedule, with payments due by the 15th of the following month. The Department of Revenue reviews a July to June lookback period each year and can move you to another schedule. Every open account files Form MW-3, the annual W-2 and 1099 reconciliation, by January 31. Source: Montana Department of Revenue, checked September 26, 2026.
• Unemployment wage reports. Your quarterly UI wage report and payment go to the Department of Labor and Industry by April 30, July 31, October 31 and January 31. Since July 1, 2025, every quarterly report has to be filed through an approved electronic method. Source: Montana Department of Labor and Industry, Unemployment Insurance Division, checked September 26, 2026.
• Pass-through entity tax. Partnerships and S corporations can elect Montana's pass-through entity tax. The election is made each year on a timely filed Form PTE and can't be made after the return's extended due date. When estimated payments are required, calendar-year filers pay on April 15, June 15, September 15 and January 15. Source: Montana Department of Revenue, checked September 26, 2026.
• Annual report. Every Montana LLC and corporation, profit or nonprofit, files an annual report with the Secretary of State. Reports filed from January 1 through April 15 carry no fee. After April 15, the fee is $35. Source: Montana Secretary of State, checked September 26, 2026.
• CPA title. Only a person holding a current Montana CPA license, or qualifying for the practice privilege, may use the title certified public accountant or CPA. The law also bars titles such as licensed accountant or chartered accountant that could be confused with CPA. Source: Montana Board of Public Accountants, checked September 26, 2026.

How to check a Montana firm yourself

Any firm that calls itself a CPA practice should show up on the Montana Board of Public Accountants lookup. For the business itself, search its legal name on the Montana entity search. Someone trading under their own name may not be there at all, and that's normal. We can't match Montana's records automatically, which is why most Montana firms here show Not verified for a license or registration. It means unchecked, not failed, so run the search yourself on your shortlist.

What Montana firms put in writing

14 of the 18 firms we list in Montana say nothing about fees on their websites, and 3 publish a price or a starting price, 17% against 10% nationally. 6 of 18 say how often reports arrive (33%, against 21% nationally), 4 describe onboarding and 4 offer catch-up or cleanup work. QuickBooks is the software named most, by 33% of Montana firms.

Where to start in Montana

• Firms that publish a price or a starting price: Abundant Skies Tax & Accounting, Elevated Advisory & Accounting and Marlow Accounting.
• Firms that say they take on catch-up work: Abundant Skies Tax & Accounting, Barta Business Group, Elevated Advisory & Accounting and Elevated Tax & Accounting.

Questions for the first call

• What is the monthly fee, how many transactions does it assume, and what costs extra?
• When do I get last month's numbers, and in what form?
• Who files the wage withholding return, you or me, and is it inside the fee?
• How do you keep the records for unemployment wage reports ready before each due date?
• Will you take on months I'm behind on, and is that priced separately?
• Which accounting software do you work in, and who owns the file if we part ways?