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State program

Maine Research Expense Tax Credit

A dual-component credit covering both incremental research spending and basic research payments.

  • Offset only

Last reviewed October 2026

Program overview

Maine combines a standard incremental research credit with a super credit for basic research payments made to universities and qualifying research organisations. The credit may offset only a portion of Maine income tax liability in any single year, but the carryforward period is long, so credits generated during heavy research years remain useful as a company matures. Maine follows federal Section 41 definitions with expenses restricted to research conducted in Maine.

Eligibility

Taxpayers with qualified research expenses for research conducted in Maine, and taxpayers making basic research payments to Maine-based research institutions.

Benefits

Non-refundable credit limited to a percentage of Maine income tax liability each year.

Caps, deadlines and forms

Caps and limits

  • Non-refundable credit limited to a percentage of Maine income tax liability each year.

Deadlines

Claimed on the annual return; no separate application deadline is stated.

Forms

Filing forms are listed by the revenue authority: official source (opens in a new tab).

Maine IDR questions

What an examiner is likely to ask about this credit. S1–S7 apply to every state claim; the rest come from this program's own rules.

  1. S1Confirm the research was physically performed within Maine.
  2. S2Provide the Maine qualified research expense calculation and base amount.
  3. S3Reconcile Maine expenses to the federal Form 6765.
  4. S4Show how wages and supplies were apportioned between Maine and other locations.
  5. S5Provide the Maine return and credit schedule for each year claimed.
  6. S6Show the carryforward schedule for unused Maine credits.
  7. S7Confirm the entity claiming the credit is the entity subject to Maine tax.

Draft questions for illustration, reviewed by a specialist before any engagement.

Common weak spots

  • Expenses for research performed outside Maine included in the Maine claim.
  • Caps and proration not modelled, so the expected benefit is overstated.
  • Base amount computed from incomplete historical records.

See how your claim holds up

The mock audit drafts these questions for your own claim and scores the evidence behind each answer.

Run a mock audit for Maine

Information on this page is general in nature, not tax advice. Program details change frequently; always confirm current rules with the relevant revenue authority or engage a specialist before acting. Last reviewed October 2026.

Find out what your research actually qualifies for

A scoping conversation takes thirty minutes and costs nothing. You leave with a view on eligibility, likely credit range and the documentation you would need.

Free R&D mock audit: completely free. Book a call or email hello@creditarmor.ai for a login.