What's the difference between a short-term and long-term IRS payment plan?

A short-term payment plan gives you up to 180 days to pay in full and carries no setup fee. A long-term installment agreement lets you pay monthly over a longer period — generally up to 72 months for balances that qualify — but charges a setup fee that varies by how you apply and pay. Both continue to accrue interest and the failure-to-pay penalty until the balance is gone.

How much can I owe and still qualify online?

Individuals can generally set up a long-term plan online if they owe $50,000 or less in combined tax, penalties, and interest and have filed all required returns. For a short-term plan, the online threshold is $100,000 or less. Businesses can typically apply online for a long-term plan if they owe $25,000 or less and have filed all returns.

Do penalties and interest stop once I'm on a payment plan?

No. Interest keeps accruing on the unpaid balance until it's paid in full, and the failure-to-pay penalty continues to run — though being on an approved installment agreement cuts that penalty roughly in half, from 0.5% to 0.25% of the unpaid tax per month for individuals. So a plan reduces the bleeding but doesn't stop it.

What's the cheapest way to set up an IRS installment agreement?

Applying online and paying by direct debit is the least expensive option — the setup fee is significantly lower than applying by phone, mail, or in person, and low-income taxpayers can have the fee reduced, waived, or reimbursed. A short-term plan of 180 days or less carries no setup fee at all if you can clear the balance in that window.

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Tax Debt Resolution

IRS Installment Agreements: How Payment Plans Work and What They Cost

If you owe the IRS more than you can pay at once, an installment agreement is usually the fastest, most reliable fix. Here's how the plan tiers work, what setup costs, and why the meter keeps running.

SMAART Tax Team

February 18, 2026

6 min read

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