Maine 2026 Withholding Tables and Supplemental Wage Changes

As a reminder for employers, Maine Revenue Services (MRS) has updated the state income tax withholding tables for wages paid on or after January 1, 2026. The update refreshes both the wage‑bracket and percentage‑method tables and confirms that when supplemental wages (such as bonuses or commissions) are paid separately from regular pay, employers may withhold a flat 5%. If supplemental pay is combined with regular wages, withholding must be calculated using the regular tables as a single combined payment.

This update is applicable to all employers with employees in Maine and applies to pay dates on or after January 1, 2026.

What Employers Need to Do

• Implement and validate the 2026 Maine tables: Confirm your payroll system is using the 2026 Maine wage‑bracket and percentage‑method tables (with correct exemption and standard deduction settings, including phase‑outs), and run a few test calculations at different wage levels and filing statuses before the first 2026 payroll, saving the test results as part of your audit trail.

• Set up supplemental wage and deduction handling correctly: Configure supplemental wages so that separate bonus/commission checks use the 5% flat Maine withholding rate, while combined paychecks use the regular 2026 tables on total taxable wages, and verify that your percentage‑method formulas apply the 2026 personal exemption and standard deduction logic as described in the state instructions.

• Update procedures and resources with 2026 Maine materials (Click Here): Refresh internal payroll/HR procedures, job aids, and checklists to reference 2026 Maine forms (such as Form 941ME and W‑4ME) and the 2026 withholding tables booklet, remove 2025 references, and ensure staff can easily access these resources via shared drives or links.

• Train staff and monitor initial 2026 pay runs: Provide a short briefing for payroll and HR on the 2026 changes (new tables, 5% supplemental rule, and standard deduction phase‑out), then spot‑check Maine withholding on the first few 2026 payrolls—including employees with supplemental pay—to confirm calculations match the 2026 tables and correct any configuration issues promptly.

Overview

What changed in 2026:

• Tables refreshed to reflect 2026 parameters for exemptions and deductions.

• Supplemental wages: 5% flat when paid separately; otherwise combine with regular wages and use the tables.

Amounts used in 2026 withholding:

• Personal exemption: $5,300 per allowance.

• Standard deduction (for withholding calculations):
  • For a single person: the standard deduction is $12,450 when annualized wages are at or below $102,250. As income rises above that level, the deduction gradually decreases and becomes $0 once annualized wages reach $177,250.
  • For someone who is married: the standard deduction is $27,750 when annualized wages are at or below $204,550. It gradually decreases and becomes $0 once annualized wages reach $354,550.

• Standard deduction amounts used for filing 2026 tax returns (not for paycheck withholding)
  • Single or Married Filing Separately: $15,300
  • Head of Household: $22,950
  • Married Filing Jointly: $30,600

Why this matters:

• Ensures accurate withholding on day one of 2026, preventing under‑ or over‑withholding for employees.
• Reduces manual overrides and rework for supplemental payments.
• Helps avoid notices, penalties, and interest tied to incorrect setups or missed updates.

Key Risks for Employers

• Delayed table updates: If the 2026 tables are not loaded before the first 2026 payroll, the system calculates state withholding incorrectly and triggers corrections.

• Misuse of the five‑percent rule: Applying the five‑percent rate when supplemental pay is combined with regular wages is wrong; it applies only when supplemental pay is issued separately.

• Ignoring the phaseout: Skipping the standard‑deduction phaseout in the percentage method produces inaccurate withholding.

• Outdated procedures: Internal guides that still reference 2025 tables or old bonus rules can lead staff to apply incorrect methods.

• Training gaps: Insufficient training causes inconsistent treatment across pay runs and locations.

Source References:

• Maine Revenue Services – Employment Tax Returns – 2026
• Maine Revenue Services (Booklet) – Withholding Tables for Individual Income Tax 2026 – (Rev October 2025)

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