How the math checks out

Divide the new rent by the old rent and subtract 1. If the number is 0.10 that's 10%. In Montana there is no percent cap, so the fairness test is more about notice, lease terms, and local rules.

Even a legal increase can be negotiated. Ask about a longer lease, request a smaller increase in exchange for renewing early, and document what similar units in your area rent for.

MontanaLast reviewed April 2026

Is a 10% rent increase legal in Montana?

Quick answer

In Montana a 10% increase is generally within the legal range because there's no statewide percentage cap, as long as you get 30 days' written notice.

Step-by-step answer

Step 1
How the math checks out
Divide the new rent by the old rent and subtract 1. If the number is 0.10 that's 10%. In Montana there is no percent cap, so the fairness test is more about notice, lease terms, and local rules.
Step 2
What to do next
Even a legal increase can be negotiated. Ask about a longer lease, request a smaller increase in exchange for renewing early, and document what similar units in your area rent for.

Plain English recap

In Montana a 10% increase is generally within the legal range because there's no statewide percentage cap, as long as you get 30 days' written notice.

Check your specific situation

Step 1 of 50%

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I use a Section 8 / Housing Choice VoucherHCV tenants follow different rules — increases require PHA approval and rent-reasonableness review.

Free legal help in Montana

Walk through three quick steps to find the right tenant-rights program for your situation.

What do you need help with?

When you call, ask about: a tenant intake appointment

Say: "I'm a tenant and need help understanding my rights and options."

Bring: your lease, recent rent receipts, and any letters or notices from your landlord.

Tip: swipe left/right on mobile to move between steps.

State listings sourced from the federal Legal Services Corporation (LSC) grantee directory. Educational information, not legal advice or endorsement.

State source

Mont. Code §70-24

Educational only — not legal advice. Educational only — not legal advice. This page summarizes statewide rules and may not reflect city ordinances, your specific lease, or recent changes. For your situation, consult a licensed attorney or your local tenant-rights organization.

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