Payroll Montana: Employer Tax and Software Guide

My advice to any founder hiring in Montana: read the employment rules twice and the tax rules once. This guide covers what Montana requires from employers as of October 2026, the rules that most commonly generate wage claims, and how 10 payroll providers price the work, with costs modeled at 10, 25, and 50 employees wherever rates are published.

On the tax side, Montana is one of the easiest states in the country to run payroll in. Two brackets. No local income tax anywhere. No general sales tax. Withholding and unemployment insurance are the entire state-level obligation.

On the employment law side, it is the hardest. Montana is the only state that abolished at-will employment by statute, which means firing someone who has cleared their probationary period requires documented good cause or the company faces up to four years of back wages. A discharged employee's final paycheck can be due within four hours.

There is no tip credit, so a server earns the full state minimum in cash, $11.20 an hour from January 1, 2027 ($10.85 through December 31, 2026), before a single tip. And since July 2025, every new hire's work authorization has to be verified, with copies of the proof kept on file.

What Montana requires from employers

Montana's state payroll obligations come down to income tax withholding and unemployment insurance, plus one hiring rule on verifying each new hire's work authorization.

State income tax withholding after HB337

House Bill 337, passed by the 2025 Legislature, changed Montana's income tax, and with it withholding, in two directions at once: it widened the lower bracket substantially and cut the top rate. The changes apply to tax years 2026 and 2027.

For 2027 the lower bracket widens again, to $65,000 single and $130,000 joint, and the top rate falls to 5.4 percent. The Department of Revenue adjusts the wage withholding tables to match and asks employers and payroll providers to confirm they are running current figures.

Two other changes sit outside wage withholding. Long-term capital gains stay at 3.0 and 4.1 percent with brackets adjusted to match, and the Montana earned income tax credit rises to 20 percent of the federal credit beginning in 2026.

Unemployment insurance and a wage base that moves every year

Montana funds unemployment insurance entirely from employer contributions. The 2026 taxable wage base is $47,300, which the Department of Labor and Industry sets at 80 percent of the state average annual wage from two years prior, rounded to the nearest hundred dollars.

That figure was $45,100 in 2025 and it recalculates every year, unlike states that hold a wage base steady for a decade. For 2026, Montana is using Schedule 1 of its contribution rates, which puts experience-rated employers anywhere between 0.00 and 6.12 percent, with an average near 0.95 percent.

A new Montana employer is assigned the average rate of employers in its industry classification rather than one flat statewide number. Every employer also pays an administrative fund tax on top, 0.18 percent for most and 0.13 percent for employers in eligible rate classes 01 and 02.

Verification before the first day

The Legal Employment and Government Accountability Law, House Bill 226, took effect July 1, 2025. Under Mont. Code Ann. 39-2-1603, every Montana employer must verify the work authorization of each new hire and keep a copy of either the E-Verify result or a completed Form I-9 with the documents that establish identity and work authorization.

The statute ties the timing to the federal I-9 deadlines, which give an employer three business days after the hire to examine documents. The Department of Labor and Industry describes the duty as verification before a new employee begins work, so the cautious course is to finish it before day one.

Wage rules that catch employers out

Montana's wage rules catch employers in two places: the minimum wage cannot be offset by tips, meals, or a training rate, and wages must be paid within ten business days after they become due and payable.

No tip credit, no meal credit, no training wage

Montana's minimum wage is $11.20 per hour from January 1, 2027 ($10.85 through December 31, 2026), indexed annually to the Consumer Price Index under Mont. Code Ann. 39-3-409 and announced no later than September 30 each year for the following January.

The rate itself is unremarkable. What catches out-of-state operators is what Montana does not allow. Per the Department of Labor and Industry, no tip credit, meal credit, or training wage exists under Montana law. The only lower rate is a narrow exception for small businesses outside the federal Fair Labor Standards Act (FLSA).

For a restaurant group moving into Montana from a tip-credit state, the missing tip credit alone can change the labor cost model materially. Overtime is standard: 1.5 times the regular rate after 40 hours in a week.

The ten business day rule

Montana does not dictate a pay frequency, but Mont. Code Ann. 39-3-204 sets an outer boundary: wages must be paid within ten business days after they become due and payable. Weekly, biweekly, semi-monthly, and monthly cycles are all permitted as long as each satisfies that limit.

Every payment also carries a paperwork rule. Under Mont. Code Ann. 39-3-101, each payment must come with an itemized statement of the deductions taken, or a statement that there were none.

Termination, final pay, and the only state without at-will employment

Montana is the only state without at-will employment: after probation, a discharge needs good cause, and the final paycheck is due the same day unless a pre-existing written policy extends the deadline.

The Wrongful Discharge from Employment Act

Montana abolished at-will employment for private employers in 1987. The Wrongful Discharge from Employment Act (WDEA), at Mont. Code Ann. 39-2-901 through 39-2-915, is the single most consequential employment statute in the state and has no equivalent anywhere else in the country.

Once an employee completes a probationary period, termination requires good cause, which the statute defines as reasonable job-related grounds based on failure to satisfactorily perform job duties, disruption of the employer's operation, a material or repeated violation of the employer's written policies, or another legitimate business reason.

Damages are capped at four years of lost wages and fringe benefits, with interest, minus what the employee earned elsewhere in the meantime. Punitive damages require proof that a retaliatory discharge involved actual fraud or actual malice.

The employer sets the probationary period, or says that there is none, at or before the start of work. If it does neither, the statute supplies a 12-month probationary period, and the original period plus any extensions cannot exceed 18 months. Spell the period out in the offer letter and handbook rather than relying on the default.

Montana employers are also bound by their own written personnel policies. A discharge is wrongful when the employer materially violated an express provision of its own written policy and that violation cost the employee a fair chance to keep the job. Failing to follow your own stated termination procedure can therefore support a claim by itself.

Final paycheck within four hours

Montana's discharge deadline is among the strictest in the United States, and it is the rule most likely to catch a payroll process that only runs on schedule. A discharged employee's wages are due immediately, which the Department of Labor and Industry reads as within four hours or by the end of the business day, whichever occurs first.

Failing to pay wages when due is a misdemeanor under Mont. Code Ann. 39-3-206, and the employer also owes the employee a penalty of up to 110 percent of the wages due and unpaid, on top of the wages themselves.

The operational consequence is specific: a Montana employer needs the ability to run an unscheduled off-cycle payroll on the same day, without a per-run fee and without a multi-day processing window. That is a real differentiator between providers and it is worth testing during a trial rather than discovering during a termination.

10 payroll providers for Montana employers compared

Every provider below files Montana withholding and unemployment insurance. Since Montana has no local tax layer, the differentiators here are off-cycle payroll speed, how the platform handles the annually shifting wage base, and whether onboarding can capture the HB 226 verification step.

OnPay

OnPay offers one payroll plan at $49 per month plus $6 per employee, so there are no tiers to climb, and HR tools and time tracking are sold as add-ons. Tax filing covers all 50 states with no multi-state surcharge, and year-end W-2 and 1099 filing sits in the base price.

OnPay keeps a Montana payroll tax and registration guide in its help center, a reasonable signal of how closely a provider tracks state changes.

Gusto

Gusto is a common first payroll purchase for US small businesses, with automatic tax filing, published pricing, and onboarding built into the same account. Its Simple plan runs $49 per month plus $6 per employee after a base increase from $40 during 2025.

Simple covers a single state only, so a hire in Wyoming, Idaho, or North Dakota moves you to Plus at $80 plus $12 per employee. Off-cycle runs carry no per-run charge, which matters given Montana discharge timing. Next-day pay is included on Plus or costs $15 a month plus $3 per person as a Simple add-on.

Square Payroll

Square Payroll's full-service plan runs $35 per month plus $6 per person paid, with unlimited pay runs, off-cycle payments, and a choice of four-day, two-day, or next-day direct deposit. Next-day deposit applies when payroll is funded from the Square balance.

For Montana's seasonal economy (hospitality in Whitefish and Big Sky, guiding outfits, and restaurants in Bozeman and Missoula), the combination of Square point of sale (POS) timecards feeding payroll and fast off-cycle runs fits the operating pattern well.

Patriot Software

Patriot Full Service is the lowest-cost full-service payroll on this page at every headcount modeled below. It runs $37 per month plus $5 per employee and includes federal, state, and local tax filing, while new hire reporting stays with you. Basic is $17 plus $4 if you file taxes yourself. Additional states cost $12 per month each.

The caution for Montana is deposit speed rather than price: standard direct deposit takes four business days, or two for established customers who request it, which does not fit a four-hour discharge deadline unless you keep the ability to cut a physical check.

SurePayroll

SurePayroll is owned by Paychex and aimed at very small employers and household employers. Its Small Business plan is $29 per month plus $7 per employee, with a flat $9.99 monthly multi-state fee. Payroll can be scheduled to run automatically, but SurePayroll lists no employee onboarding workflow, a gap given the verification copies HB 226 requires.

QuickBooks Workforce Payroll

Workforce Payroll, formerly QuickBooks Payroll Core and renamed in May 2026, is $50 per month plus $7 per employee. The case for it is the general ledger sync: if the books already live in QuickBooks Online, payroll entries land without an export step.

Workforce Payroll includes unlimited payroll runs and next-day direct deposit. Same-day deposit starts on Workforce Premium, the tier worth considering for Montana termination timing.

ADP RUN

ADP describes the same tax service behind every RUN package: it calculates, files, deposits, and reconciles payroll taxes, responds to agency inquiries, and pays the resulting fines if it makes a filing error. In Montana the value of that service is quieter than in local-tax states, since the annual wage base recalculation is the main moving part.

ADP's state unemployment insurance management starts on the Enhanced package, and multi-jurisdiction payroll is included in all four packages. ADP says no contract is required and services can be terminated at any time.

The cost is opacity. ADP publishes no RUN rates, so every package from Essential to HR Pro is quoted individually. Its packages page also lists direct deposit with no same-day or next-day tier, so ask how a same-day final check would be paid.

Paychex Flex

Paychex competes on service rather than software, with the option of a dedicated payroll specialist on every package and premium support with advisors on the Complete package. Pricing is quote-only, and its Paychex Promise add-on allows two same-day deposit requests a year.

In a state where a termination question carries four-year back-pay exposure, having someone at Paychex to call has more value than it does elsewhere.

Paylocity

Paylocity sits between small-business payroll and a full human capital management (HCM) suite, aimed at companies that have outgrown basic payroll. The HR module covers performance management, which is directly relevant in a good-cause state where documented performance history is the defense against a wrongful discharge claim. Pricing is quote-based and implementation is a project.

Rippling

Rippling unifies payroll, HR, and IT provisioning on one employee record. Its small-business page starts payroll plans at $8 per user per month plus a $40 monthly base fee, and its blog prices the core platform and the payroll module, sold separately, at $8 per employee a month each (payroll is $10 billed monthly).

Rippling's pricing page itself is a quote form, and real configurations add modules on top of that starting point of $40 plus $8 per user. Rippling says payroll can run as often as you need at no extra charge, though its payroll page lists no next-day deposit option.

What each provider actually costs a Montana employer

The table below models published rates at three headcounts, leaving out Paychex Flex, Paylocity, and Rippling, whose totals depend on a quote or on the modules you add. Montana borders four states plus Canada, and Bozeman and Billings employers routinely hire across the Wyoming, Idaho, and North Dakota lines, so the second-state column deserves attention.

Patriot and Square anchor the low end. Square includes unlimited pay runs, with next-day deposit when payroll is funded from the Square balance, and in Montana that is worth more than the $8 monthly difference at 10 employees suggests.

Gusto Simple is competitive until a single out-of-state hire forces the Plus tier, taking a 25-person payroll from $199 to $380 per month.

Choosing a payroll provider for Montana

Ask each provider four questions, starting with off-cycle speed, because the discharge deadline is where a slow payroll costs you most.

Before you choose

FirstHR covers the document layer around payroll, while the providers above run payroll, file payroll taxes, and administer benefits. If running payroll is the problem in front of you, one of them is the answer.

That layer means onboarding workflows that put Form I-9 and the W-4 on the first-day task list of every new hire, e-signature on offer letters and acknowledgments, employee records, and document management that keeps completed forms and document copies in the employee file. The forms themselves are completed outside our platform, and pricing is a flat $98 a month for up to 10 people or $198 for 11 to 50.

Two of the Montana requirements above are document problems rather than payroll problems: keeping the copies that House Bill 226 requires (the I-9 with its documents, or the E-Verify result), and holding the signed acknowledgments and records that a good-cause termination has to rest on. If those are where things break, that is the gap we built for.

Frequently Asked Questions

What are the current Montana payroll tax rates?

Two brackets: 4.7 percent up to $47,500 single, $71,250 head of household, and $95,000 married filing jointly, with 5.65 percent above. House Bill 337 cut the top rate from 5.9 percent and schedules a further drop to 5.4 percent in 2027. There is no local income tax and no general sales tax anywhere in Montana.

What is the Montana SUI wage base and rate?

The 2026 state unemployment insurance (SUI) wage base is $47,300, set at 80 percent of Montana's 2024 average annual wage of $59,106.64. Montana runs Schedule 1 for 2026, putting experience-rated employers between 0.00 and 6.12 percent, averaging around 0.95 percent. New employers pay their industry's average rate, and every employer adds an administrative fund tax of 0.13 to 0.18 percent.

Does Montana allow a tip credit?

No. The Department of Labor and Industry states that no tip credit, meal credit, or training wage is allowed. Tipped employees receive the full cash minimum, $11.20 from January 1, 2027 ($10.85 through 2026), and keep tips on top. The only exception is a non-FLSA business with gross annual sales of $110,000 or less, which may pay $4.00 per hour.

When is a final paycheck due in Montana?

For a discharge or layoff, immediately, which the state labor department treats as within four hours or by the end of the business day, whichever arrives first. A pre-existing written policy can extend this to the next payday or 15 days, whichever comes first, but no further.

If the employee quits, wages are due on the next payday for that period or within 15 days, whichever is first.

Is Montana an at-will employment state?

No, and it is the only state that is not. In 1987 the Wrongful Discharge from Employment Act replaced at-will employment for private employers with a good cause standard that applies once an employee completes probation. Remedies run up to four years of lost wages and fringe benefits plus interest, and punitive damages need a retaliatory discharge marked by actual fraud or malice.

What is Montana's employment verification requirement?

Since July 1, 2025, House Bill 226 has required every employer to verify each new hire's work authorization on the federal I-9 timeline and keep a copy of the E-Verify result or the completed Form I-9 with its documents.

Fines reach $500 per unauthorized employee for a first violation and $1,000 for a second; a third brings up to $2,500 plus a license suspension.

How often must Montana employers pay wages?

There is no mandated frequency, but wages must be paid within ten business days after becoming due and payable while the employee is still employed. Weekly, biweekly, semi-monthly, and monthly cycles all work within that limit. Every payment also needs a statement itemizing the deductions, or saying there were none.

Does Montana have local payroll taxes?

No. No city or county in Montana levies an income tax, and there is no general state sales tax. State withholding and unemployment insurance are the only two state-level payroll obligations. Montana is absent from the Tax Foundation's list of states with local income taxes.

How much does payroll software cost for a Montana small business?

At 10 employees, published October 2026 rates run roughly $87 for Patriot Full Service, $95 for Square, $99 for SurePayroll, $109 for OnPay or Gusto Simple, and $120 for QuickBooks Workforce Payroll. At 50 employees the same plans land between $287 and $400. ADP RUN, Paychex Flex, and Paylocity quote individually.