Interest on Delinquent Taxes
Interest on delinquent taxes is the financial charge that accumulates on unpaid property tax bills after the due date. Once property taxes become delinquent, your taxing jurisdiction adds interest at a specified rate, compounding either annually or monthly depending on state law. This charge applies separately from penalties and continues accruing until you pay the full balance.
How Interest Rates Work
Interest rates on delinquent property taxes vary significantly by state and county. Most jurisdictions charge between 6% and 12% annually, though some states like South Carolina and Kentucky can reach 12% or higher. Illinois charges 1.5% per month, which compounds to 18% annually. The rate is typically fixed at the time taxes become delinquent, not at the current market rate.
You'll find the exact rate in your county assessor's or tax collector's office. It's often published in the property tax bill itself or in your jurisdiction's property tax code.
When Interest Starts Accruing
Interest begins on the first day after the tax payment deadline, not on the assessment date. Most property taxes are due between December and April, depending on your state. If you pay on the due date, you pay zero interest. If you pay one day late, interest begins accumulating immediately.
The only way to avoid interest entirely is to pay before the deadline. Partial payments typically stop interest only on the amount paid, not the remaining balance.
Interest During Assessment Appeals
This matters significantly for homeowners and commercial owners contesting high assessments. If you appeal your assessment to the board of review and eventually win a reduction, the question of interest refunds becomes crucial. Most states do not refund interest on taxes paid during the appeal period, even if your new assessment is lower. You'll recover the overpaid principal amount, but interest already paid is typically gone.
Some jurisdictions, however, do refund interest if your assessment reduction is substantial enough. Check your specific county's appeal rules. Filing an appeal does not stop interest from accruing on the tax amount you believe is too high.
Interest Versus Penalties
Interest and penalties are separate charges. Interest is the time cost of using the government's money. Penalties are punitive charges for non-compliance. A late tax payment might generate both 8% annual interest and a 10% penalty, for example. You can dispute a penalty more easily than interest, since interest rates are generally fixed by law.
Managing Interest on Disputed Assessments
- Pay the lower amount: If you believe your assessment is inflated, pay only the amount you consider correct. Interest then accrues on the disputed portion only. If you win the appeal, you've limited interest charges on the overpayment.
- Request a stay: Some counties allow you to request that interest be suspended during the board of review hearing process. This is rare and requires a formal request.
- Document your assessment challenge: Keep copies of comparable sales data, appraisal reports, and any professional valuation work you've done. This supports your position if the taxing authority questions your good faith in paying a reduced amount.
- Track the timeline: Know when your appeal hearing is scheduled. Interest continues running until final resolution, so expediting the appeal process directly reduces total interest charges.
Common Questions
Can I negotiate the interest rate on delinquent taxes?
No. Interest rates are set by state statute and cannot be negotiated. However, you can dispute the underlying tax amount through the assessment appeal process, which reduces the principal on which interest accrues. Payment plans sometimes allow you to avoid additional penalties, but not interest.
If my assessment is reduced after I paid the full amount with interest, do I get the interest back?
Rarely. Most states refund the overpaid principal tax amount but keep the interest already collected. A few jurisdictions refund interest if the assessment reduction exceeds a certain threshold, typically 10% or more. Contact your county assessor to confirm your jurisdiction's policy.
Does filing a board of review appeal stop interest from accruing?
No. Interest continues accruing on the tax amount through the entire appeal process, including board of review hearings and any subsequent appeals. Filing an appeal does not create a legal hold on interest charges.