IRS Installment Agreement Calculator
Owe the IRS and need to pay over time? Calculate your monthly payment, total interest at the current §6601 rate, the reduced 0.25%/month failure-to-pay penalty, and the right setup-fee tier — all for streamlined payment plans up to $50,000 over 72 months.
Direct debit (DDIA) is cheaper to set up + lower default risk + protects against IRS auto-termination.
Effective annualized cost rate: 5.46%
Combines IRS interest rate + 0.25%/mo (3% APR) failure-to-pay penalty. Compare against a personal loan or 0% credit card promo — sometimes private financing beats the IRS, sometimes not.
IRS interest accrues daily and compounds at the §6601 rate (federal short-term + 3%) regardless of whether you have an IA. Setting up an IA cuts the failure-to-pay penalty in half (0.5% → 0.25% per month) but does not stop interest accrual.
Direct debit IAs are strongly recommended: lower setup fee, lower default risk, and protection from automatic IRS termination.
$50k / 72mo Streamlined
No financial disclosure if balance ≤ $50,000 AND term ≤ 72 months. Above either: Form 433-F required.
$31 DDIA Setup
Online application + direct debit is the cheapest setup. Phone/mail + manual payment is $225 — almost 7× more.
FTP Penalty Halved
Standard failure-to-pay penalty is 0.5%/mo. With an active IA, it drops to 0.25%/mo — saving 3% annualized vs no IA.
No Credit Impact
Federal tax liens stopped appearing on credit bureau reports in 2018. An IA does NOT show up on your TransUnion / Equifax / Experian file.
Frequently asked questions
How does an IRS installment agreement work?
An IRS installment agreement (IA) under IRC §6159 lets you pay back taxes monthly over up to 72 months for streamlined plans (balance ≤ $50,000). Apply online at IRS.gov/payments using the Online Payment Agreement tool, by phone at 1-800-829-1040, or via Form 9465. Setup fees range from $31 (online + direct debit) to $225 (phone/mail + manual payment). Low-income taxpayers (≤250% FPL) pay $43 flat or $0 with direct debit.
What interest rate does the IRS charge on an installment agreement?
The IRS interest rate is the federal short-term rate + 3 percentage points, set quarterly per IRC §6621. For Q2 2026 the rate is 7% annualized, compounded daily under §6622. The interest does NOT pause when you set up an IA — it continues to accrue until the balance is fully paid.
Does the failure-to-pay penalty stop with an installment agreement?
No — but it gets cut in half. Without an IA, the failure-to-pay penalty under IRC §6651(a)(2) is 0.5% per month (or fraction). With an IA in effect, it drops to 0.25% per month — saving 3% annualized. After the IRS issues a final intent-to-levy notice, the penalty jumps to 1% per month, but a properly maintained IA prevents that.
What's a streamlined installment agreement?
A streamlined IA is the simplest type — no financial disclosure (Form 433-F) required. Eligibility: balance owed ≤ $50,000 and term ≤ 72 months. Approval is essentially automatic if you've filed all returns and meet the limits. Above $50k or 72 months, you need a long-term IA which requires submitting Form 433-F (Collection Information Statement) showing income, expenses, and assets.
Should I use a personal loan or credit card instead of an IRS installment agreement?
Compare effective annualized cost. The IRS IA combined cost (interest + penalty) is roughly 7% + 3% = 10% per year. A 0% APR balance-transfer credit card with a 3-5% transfer fee is cheaper if you can pay off within the promo window. A personal loan at 8-12% APR is usually similar. The IRS IA has no impact on your credit report (federal tax liens were removed from credit bureau reports in 2018).
What happens if I miss an installment agreement payment?
One missed payment puts the IA in default risk. The IRS sends a CP523 notice (intent to terminate). You typically have 30 days to cure the missed payment. If you don't, the IA terminates, the FTP penalty jumps from 0.25%/mo back to 0.5%/mo (1%/mo after final levy notice), and IRS collection actions resume. Direct debit IAs are far less likely to default — the payment is automatic from your bank.
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Related insights
Use these guides for rule explanations, planning context, and follow-up questions beyond the calculator result.