The IRS has announced that federal interest rates will remain unchanged for the third quarter of 2025. These rates apply to tax overpayments, underpayments, and penalties — and they play a critical role in tax planning, cash flow forecasting, and dispute resolution for both individuals and businesses.
This decision, which holds the current rate levels through July 1 to September 30, 2025, reflects the IRS’s response to stable economic indicators and inflation trends.
For Q3 2025, the rates are:
These rates are determined quarterly under Section 6621 of the Internal Revenue Code and are tied to the federal short-term rate plus a fixed spread.
IRS interest rates affect a wide range of tax issues, including:
Taxpayers — especially those with variable income (e.g., business owners or investors) — must pay quarterly estimates to avoid underpayment penalties. An unchanged interest rate means no additional cost pressure, but it also keeps the penalty rate steady for those who underpay.
For overpaid taxes or amended returns, the IRS uses these rates to calculate interest on refunds. Knowing the 7% rate allows firms to more accurately forecast refund interest for clients.
In cases where taxpayers are settling underpaid taxes through installment agreements or audit resolutions, the 7% interest rate on underpayments can add up. It’s critical to factor this into negotiation strategy and payment timing.
After several quarters of rising rates in response to inflation, this is now the third consecutive quarter the IRS has held rates steady. The move aligns with broader signals from the Federal Reserve, which is taking a wait-and-see approach before adjusting benchmark interest rates.
For now, the IRS is signaling that it sees no immediate need to adjust tax-related borrowing or repayment costs.
IRS interest rates may seem like a technical detail, but they have real implications for tax liability, refund value, and compliance costs. With rates holding steady at relatively high levels, tax professionals should ensure clients understand how these numbers affect their broader financial picture.
At Bizora AI, we continue to track regulatory updates and help CPA firms translate them into smart, timely strategies.