Understanding Tax Penalties in 2026

Penalties are where a $40,000 tax bill becomes $62,000. They are also where a competent representative often gets the fastest yes from the IRS, because first-time abatement is an IRM procedure, not a favor.

The penalties you will actually see

• Failure to file: 5% of unpaid tax per month, max 25%. If a return is more than 60 days late, a minimum penalty applies. File even if you cannot pay — the failure-to-file rate is much harsher than failure-to-pay.
• Failure to pay: 0.5% per month (0.25% during a qualifying installment agreement), max 25%.
• Combined: when both apply, the failure-to-file rate is reduced by the failure-to-pay amount for those months, but you still do not want both running.
• Failure to deposit: payroll. This is how small businesses get destroyed. Trust fund recovery penalty (IRC §6672) can follow the responsible person personally.
• Accuracy-related: 20% for negligence or substantial understatement. Defended with records and a reasonable basis, not with a story.
• Estimated tax: underpayment of 1040-ES. Waivers exist (casualty, retired, annualized income) but “cash was tight” is not one of them.

Abatement that works

First-time penalty abatement is the default ask when the prior three years were clean and the tax is paid or arranged. Reasonable cause needs facts tied to dates: hospitalization, a disaster, or IRS written advice you relied on. Paying the tax first makes the conversation easier. Appeals exists for a reason — campus denials of FTA are common and often reversed.

Interest

Interest is not a penalty. Abatement of interest is narrow (IRS ministerial delay, certain disaster rules). Do not hire someone who promises to “remove interest” as a standard service.

General information for tax year 2026, not legal or tax advice. IRS programs depend on your filing history, assets, and collection statute. Talk with a representative before you send the IRS money or financials.