IRS Payment Plan Calculator 2026 β Installment Agreement Cost Estimator
Calculate how much your IRS installment agreement will cost. See monthly payment, total interest, penalties, setup fee, payoff date, and month-by-month amortization schedule.
$
Current balance including any existing penalties %
Current rate: ~7% (short-term rate + 3%) $0
Monthly Payment
$0
Total Paid
$0
Total Interest
$0
Total Penalties
$0
Setup Fee
β
Payoff Date
Month-by-Month Payment Schedule (First 12 Months)
| Month | Payment | Interest | Penalty | Principal | Remaining Balance |
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How to Use This IRS Payment Plan Calculator
Enter your total tax balance, choose your agreement type and payment method, and set the interest rate (default 7%). Select auto-calculate to find the required monthly payment for the maximum plan period, or enter a custom amount. The calculator shows interest, penalties, and a full amortization schedule.
The Formula
Monthly interest = Balance Γ (annual_rate Γ· 12)
Monthly penalty = Balance Γ (0.25% Γ· 1) while on agreement [reduced from 0.5%]
Monthly payment (auto) = Balance Γ r / (1 β (1+r)^βmonths)
where r = (annual_rate + 3%) / 12, months = plan maximum
Total cost = Ξ£(all payments) + setup_fee
Monthly penalty = Balance Γ (0.25% Γ· 1) while on agreement [reduced from 0.5%]
Monthly payment (auto) = Balance Γ r / (1 β (1+r)^βmonths)
where r = (annual_rate + 3%) / 12, months = plan maximum
Total cost = Ξ£(all payments) + setup_fee
Tips to Reduce Your Total Cost
- Pay more than the minimum β every extra dollar eliminates future interest
- Use direct debit (lowest setup fee at $22 and reduces default risk)
- Pay off in full if you can β no interest or penalties accumulate
- Request penalty abatement (first-time penalty abatement) if this is your first offense
- File all returns even if you cannot pay β the failure-to-file penalty is 10x worse than failure-to-pay
Extended
Payment Plan Comparison
Side-by-side comparison: pay in full vs 36-month vs 72-month vs 120-month plans
Payment Plan Comparison
Compare total cost across different repayment strategies for your tax balance.
| Plan | Monthly Payment | Months | Total Interest | Total Penalties | Setup Fee | Grand Total |
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Frequently Asked Questions
What is an IRS installment agreement?
An IRS installment agreement is a payment plan that lets you pay your tax debt over time in monthly installments rather than all at once. Streamlined plans for under $50,000 are easy to get β apply online in minutes. You still owe interest and a reduced failure-to-pay penalty while on the plan, but you avoid enforced collection like liens and levies as long as you stay current.
How much does an IRS payment plan cost to set up?
The IRS charges a one-time setup fee: $22 for direct debit online, $69 for non-direct-debit online agreements, and $178 if you apply by phone or mail. Low-income taxpayers may qualify for a fee waiver or reduction. The setup fee is in addition to ongoing interest and penalties.
What interest rate does the IRS charge on payment plans?
The IRS interest rate is the federal short-term rate plus 3%, compounded daily. For 2024-2026, this is approximately 7% annually. Interest accrues on the unpaid balance every day until the debt is paid in full, so paying more than the minimum monthly reduces total interest paid.
Does the IRS penalty stop when I am on a payment plan?
Not completely. The failure-to-pay penalty drops from 0.5% per month to 0.25% per month while you are in an installment agreement, which is a 50% reduction. However, the penalty continues to accrue until the balance is zero. Interest also continues to accrue daily. This is why paying as much as possible β and paying off early if you can β saves significant money.
How long can an IRS payment plan last?
Streamlined installment agreements (under $50,000) can last up to 72 months (6 years). Agreements for $50,000 to $100,000 can also be set up for 84 months (7 years). Partial Pay Installment Agreements (PPIA) can run until the Collection Statute Expiration Date (CSED), which is 10 years from assessment. Longer plans mean more interest paid over time.