- The IRS increased the underpayment interest rate to seven percent for the third quarter of twenty twenty-six.
- Late payroll tax deposits now face daily compounding interest on top of existing failure-to-deposit penalties.
- Penalties for overdue taxes can reach fifteen percent if unpaid ten days after receiving an official notice.
(UNITED STATES) — Employers face higher costs on late payroll-tax deposits starting July 1, 2026, as the IRS underpayment interest rate climbs to 7% for Q3 2026. The rate increased from 6% in Q2 2026, making every overdue federal tax deposit more expensive for businesses that miss deposit deadlines.
Payroll taxes include federal income tax withholding and the employer and employee portions of Social Security and Medicare taxes. Employers must deposit these amounts according to a schedule set by the IRS, either semiweekly or monthly, depending on the total tax liability reported during a prior lookback period. Missing a deposit deadline triggers both penalties and interest, and the interest component now costs more.
The 7% underpayment interest rate took effect July 1, 2026 and applies through September 30, 2026. The IRS adjusts these rates quarterly by adding 3 percentage points to the federal short-term rate. For Q2 2026, the rate was 6%, meaning the cost of carrying an unpaid payroll tax balance rose by a full percentage point heading into the third quarter.
Any late payroll-tax deposit made on or after July 1, 2026 accrues interest at the higher rate. Interest compounds daily on the unpaid balance and continues to accrue until the employer pays the full amount owed. The rate increase affects deposits for tax year 2026, which employers report on Form 941 and file in 2027.
The failure-to-deposit penalty is separate from interest and applies on top of it. The penalty scales with how late the deposit arrives, starting at 2% for deposits one to five days late and reaching 15% for amounts still unpaid more than 10 days after an IRS notice.
A hypothetical example illustrates the combined cost. An employer owes $10,000 in payroll taxes due June 30, 2026 but deposits late on July 15, 2026. The deposit is 15 days late, triggering a 5% penalty of $500. Interest accrues daily on the $10,000 unpaid balance at 7% annualized. If the employer pays on July 15, the interest portion totals approximately $29 for the 15-day period. Total cost reaches $10,529.
| Days Late | Penalty Rate | On $10,000 Deposit |
|---|---|---|
| 1 to 5 days | 2% | $200 |
| 6 to 15 days | 5% | $500 |
| 16+ days | 10% | $1,000 |
| 10+ days after IRS notice | 15% | $1,500 |
If the employer delays further, the penalty tier increases. A deposit made 16 or more days late triggers a 10% penalty. After 10 days following an IRS notice demanding payment, the penalty reaches 15% of the unpaid amount.
The 7% rate also applies to individual underpayments and overpayments for Q3 2026. This affects individual taxpayers who underpay estimated taxes or file late returns. The corporate overpayment rate is 6%, one percentage point lower than the individual rate. Corporate underpayments carry the same 7% rate as individuals.
📅 Deadline Alert: The Q3 2026 interest rate of 7% is effective July 1 through September 30, 2026. Any unpaid balance during this period accrues interest at this rate.
The IRS may waive the failure-to-deposit penalty if the employer demonstrates reasonable cause. Acceptable reasons include natural disasters, fire, casualty, or death or serious illness of the person responsible for making deposits. A misplaced check or insufficient funds generally do not qualify. Employers must document the circumstances and attach a written explanation when requesting relief.
Interest is statutory and generally cannot be waived for reasonable cause. Even if the IRS removes the penalty, interest continues to accrue on the unpaid tax from the original due date until the employer pays the balance in full.
⚠️ Warning: The failure-to-deposit penalty can reach 15% of the unpaid amount if not addressed within 10 days of an IRS notice. Pay overdue deposits immediately to limit penalty escalation.
Employers can take specific steps to stay compliant. Use the Electronic Federal Tax Payment System (EFTPS) to schedule deposits in advance. Verify deposit schedules regularly, as changes in tax liability can shift a business from monthly to semiweekly requirements. If a deposit cannot be made on time, pay as soon as possible to minimize both the penalty tier and interest accrual.
The IRS offers voluntary disclosure options for employers already behind. Filing all overdue returns and paying the full balance is the most direct path. Businesses unable to pay in full may qualify for an installment agreement using Form 9465. While an installment agreement stops further collection action, interest and penalties continue to accrue on the unpaid balance until it is fully paid.
Employers with payroll across multiple states or with foreign national employees on work visas should consult a qualified tax professional. Payroll tax obligations for nonresident aliens and treaty-exempt employees require careful classification to avoid both overpayment and underpayment of deposit obligations. Businesses that also handle customs duties and tariff payments should coordinate all federal deposit schedules to avoid compounding compliance failures across tax and trade obligations.
⚠️ Disclaimer: This article is for informational purposes only and does not constitute tax, legal, or financial advice. Tax situations vary based on individual circumstances. Consult a qualified tax professional or CPA for guidance specific to your situation.
