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//// Career · IRS Tax Debt

Tax Debt Payoff Calculator

IRS debt compounds at 8% APR plus a 0.5%/mo failure-to-pay penalty — that's 14% annually. Enter your debt, payment, and see the true cost, payoff timeline, and how extra payments or a lump sum changes everything.

Where this fits

🧾 TaxTax StackTrading IncomeFreelancersTraders

This tool lives inside Tax Stack + Trading Income and is most useful for freelancers and traders.

SE Tax Rate15.3%
QBI Deduction20%
Quarterly DeadlinesApr · Jun · Sep · Jan

Debt Details

Failure-to-pay penalty still accruing(0.5%/mo)

Payoff Scenarios

Months to Pay Off
50
4.2 years
Total Interest
$2,767
Accrued at payoff
Total Penalties
$2,075
Failure-to-pay total
True Cost
$4,842
Interest + penalties over principal
Base Plan
4.2 yrsto pay off
True cost: $4,842
+ $200/mo Extra
2.5 yrsto pay off
True cost: $2,839
Saves 20 mo · $2,004 less paid
$2,000 Lump Sum Now
3.5 yrsto pay off
True cost: $3,439
Saves 8 mo · $1,403 less paid
IRS Fresh Start Program

If you owe $50,000 or less and can pay within 72 months, you likely qualify for a streamlined installment agreement — no financial disclosure required. Offer in Compromise (OIC) may reduce the total owed if your debt exceeds your reasonable collection potential. Consult an enrolled agent or tax attorney for OIC eligibility.

First 12 Months

Mo.PaymentInterestPenaltyPrincipalBalance
1$400.00$100.00$75.00$225.00$14,775
2$400.00$98.50$73.88$227.63$14,547
3$400.00$96.98$72.74$230.28$14,317
4$400.00$95.45$71.59$232.97$14,084
5$400.00$93.89$70.42$235.69$13,848
6$400.00$92.32$69.24$238.43$13,610
7$400.00$90.73$68.05$241.22$13,369
8$400.00$89.13$66.84$244.03$13,125
9$400.00$87.50$65.62$246.88$12,878
10$400.00$85.85$64.39$249.76$12,628
11$400.00$84.19$63.14$252.67$12,375
12$400.00$82.50$61.88$255.62$12,120
1

Monthly interest accrual

interest = balance × (APR / 12)

$15,000 × (8% / 12)

= $100.00/mo

IRS charges federal short-term rate + 3%. Rate changes quarterly.

2

Failure-to-pay penalty

penalty = balance × 0.5% per month

$15,000 × 0.5%

= $75.00/mo

Caps at 25% of original debt. Stops accruing once paid in full.

3

Monthly debt growth

growth = interest + penalty

$100.00 + $75.00

= $175.00/mo

Your $400/mo payment must exceed this or debt grows.

4

Principal paid per month

principal = payment − growth

$400 − $175.00

= $225.00/mo principal reduction

Key insight

IRS debt is expensive in a hidden way: the 8% interest rate alone is double what most savings accounts pay, and the 0.5%/mo failure-to-pay penalty adds another 6% annually while it's accruing. The combination is 14% effective annual cost — worse than most credit cards. Every extra dollar paid today saves $1.14+ in future payments.

Use this result in →

Quarterly Tax Estimator →Cash Flow Forecast →FI Number →

#ShowYourWork

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