Texas Sales Tax Penalty and Interest Calculator
Use this calculator to estimate how much you may owe for late Texas sales and use tax, penalties, and interest. Sales tax debt is different from regular income tax debt: businesses collect the tax from customers and are expected to remit it to the state. Unpaid tax and delinquent filing obligations can become serious quickly, especially when penalty and fee charges begin to stack across multiple report periods.
Call before relying only on the calculator if you collected sales tax but didn't remit it, received a state notice, are under audit, closed the business, also have payroll/withholding issues, or believe the state may pursue personal liability. The calculator estimates penalty and interest — it does not decide whether you qualify for penalty relief, payment terms, audit reduction, or responsible-person defense.
How Texas Sales Tax Penalties and Interest Work
Texas sales and use tax is administered by the Texas Comptroller of Public Accounts. The comptroller charges a tiered penalty structure on late filing and late payment: 5% of the tax due if paid 1–30 days after the due date, rising to 10% if paid more than 30 days late, and an additional 10% penalty — for a total of 20% — if a Notice of Tax/Fee Due is issued and goes unpaid by the referenced date. A flat $50 penalty applies to each late report filed, even when no tax is owed for that period. Interest begins to accrue on the 61st day after the due date.
The interest rate is set at the prime rate plus 1 — currently 7.75% per year for 2026 — reviewed and adjusted each January 1. Because penalties are calculated per filing period, a business with delinquent returns across several report periods can accumulate a tax liability far larger than the original tax due.
Late Filing vs. Late Payment Penalties in Texas
Texas does not draw a sharp distinction between late filing and late payment for purposes of the standard penalty — both trigger the same tiered structure. If a taxpayer fails to file a required tax report by the due date, the comptroller's office will issue an estimated billing and assess the $50 late-filing penalty per report. If the tax is then paid 1–30 days after the due date, a 5% penalty applies; if paid more than 30 days late, that rate climbs to 10%.
When the comptroller issues a notice of tax/fee due and the taxpayer does not pay by the date in that notice, an additional 10% penalty is added, pushing the total penalty to 20% of the tax due. A separate 5% penalty may apply to taxpayers required to report or pay electronically who instead use another method. (Tax Code § 111.063)
Example: If your business owed $25,000 in Texas sales tax for a period and resolved it many months late, the stacked penalty and accrued interest can add thousands on top of the original tax due — and that is for a single period.
Both the date you file and the date you pay matter. A tax report filed six months late is treated differently from a report filed on time, where only the payment was late.
How Texas Interest Applies
Texas charges interest at the prime rate plus 1 percentage point, structured as prime rate plus 1, with the current annual rate at 7.75% for 2026, down from 8.50% in 2025 and 9.50% in 2024. Interest begins to accrue on the 61st day after the due date of a required report. To calculate the amount owed: multiply the tax due by the annual interest rate, then multiply by the number of days interest has accrued, and divide by 365. Interest continues to accrue until the balance is paid in full, regardless of whether a payment plan is in place. For an audit-related deficiency, interest reaches back to when the tax originally should have been reported and paid, not the date the comptroller issued the bill.
Why Sales Tax Debt Is Different From Income Tax Debt
This is the part most business owners underestimate. When a business in Texas collects sales tax from a customer, it holds money that belongs to the state. A taxpayer's collection and nonremittance of that amount gives the comptroller broad authority to treat it as a trust fund obligation — not a simple unpaid tax debt.
That distinction changes what the state can do:
Collected-but-unremitted sales tax is viewed as the state's money, not the business's.
Responsible-person liability can reach officers, managers, directors, partners, or members who willfully failed to remit.
Personal assessments may survive even if the business closes or is dissolved.
Business bank levies, liens, and permit suspension can move faster than with income tax debt.
Audit escalation and, in serious cases, criminal referral — a state jail felony or higher-degree felony under Tax Code §151.7032 — can occur where tax was collected and intentionally not paid.
Not every case is criminal — most are not. But serious cases, especially where tax was collected and knowingly kept, can involve meaningful criminal exposure. That is why delinquent sales tax debt deserves a careful look early.
Texas Sales Tax Agency and Enforcement
Texas sales and use tax is administered by the Texas Comptroller of Public Accounts. Notices typically arrive by mail and can range from a balance-due bill to a delinquency notice, an audit notice, a lien filing, a bank levy, or a threat to the taxpayer's sales tax permit or business license. State law requires that all past-due taxes, interest, and penalties owed to the state must be secured by a lien, which can affect a business's credit.
The comptroller's office has strong collection actions available and may pursue responsible persons for trust-fund amounts. Payment plans, penalty waiver, and voluntary disclosure options may exist, but availability depends on the facts and the comptroller's rules. If you have received any notice from the comptroller, it is best reviewed promptly — Texas tax timelines move faster than most business owners expect.
Texas Sales Tax Audit Assessments
If your balance comes from a sales tax audit by the comptroller's office, the numbers above may not match the state's figures. Texas audits can add tax, penalties, and interest, and findings often involve underreported retail sales, denied exemption or resale certificate documentation, missing records, nexus in Texas going unaddressed, or cash-sales reconstructions. A notice of tax due issued after an audit includes the amount owed and explains your appeal rights, including the right to request a redetermination hearing within 30 days.
Audit-related assessments also carry deadlines that can be short. Ignoring an audit notice or a determination billing typically makes the outcome worse. If you received a comptroller assessment, the most useful next step is a review before the deadline passes — not a recalculation.
Responsible-Person / Personal Liability
In Texas, officers, managers, directors, partners, or other individuals who willfully failed to collect and remit sales tax may be held personally liable for the unpaid amount under Tax Code §111.016.
Closing the business does not eliminate the tax obligation or personal exposure — dissolution of a business does not affect a responsible individual's liability.
LLC or corporate protection may not shield against a trust tax assessment where the comptroller establishes willfulness.
Who controlled the bank accounts, directed which bills got paid, or made decisions about the tax money can all matter.
A 50% fraud penalty under Tax Code §111.0611 can attach to individuals found to have participated in a fraudulent scheme to evade taxes.
Because a personal assessment can attach to your own assets, this is worth reviewing early — before the comptroller names a responsible person.
Business Closed With Unpaid Texas Sales Tax?
A closed business does not automatically erase unpaid sales tax obligations. The comptroller can still pursue the entity for delinquent returns and unpaid balances, and may assess responsible persons personally where trust-fund tax was collected. Final returns, unfiled periods, and a past-due balance remain active collection targets after closure. If your business has closed with delinquent sales tax still owed, it is better to understand the exposure than to wait for a notice.
Texas Penalty Relief, Waiver, and Resolution Options
Depending on the facts, options may include a waiver of penalty, a reasonable-cause request, a payment plan, voluntary disclosure for unregistered or unfiled periods, amended returns, a redetermination hearing or administrative appeal, a settlement where the comptroller allows it, a business-hardship request, a responsible-person defense or review, and sales tax compliance cleanup for missing returns.
A waiver request is not automatic. The comptroller reviews factors including your filing and payment history across all report periods, the reason for noncompliance, whether tax was collected from customers, whether the business cooperated, and whether you are now current.
A waiver is generally unavailable if the business has already received a waiver within the prior two years, if collection actions such as bank levies or asset seizures have already occurred, or if the obligation has been outsourced to a third-party collector. Texas waiver of penalty requests may be submitted using Form 89-224 (late report or payment) or Form 89-225 (failure to file or pay electronically), or online through the comptroller's filing portal. Required applications and supporting documentation must be complete for the request to be considered.
Texas Sales Tax Payment Plans
Texas allows payment plans for unpaid sales tax obligations, considered on a case-by-case basis to avoid undue hardship on taxpayers. A payment plan may slow some collection actions, but the account is still considered delinquent — billing notices will continue, a lien will still be filed, and state warrants will remain on hold.
Terms and eligibility depend on the balance, the periods involved, whether all returns are filed, and the taxpayer's compliance history. If keeping the business open matters, getting the plan structured the first time correctly is important.
When to get help immediately
Do not rely only on an online calculator if any of these apply to your Texas sales tax situation:
Tax was collected from customers but not remitted to the comptroller.
The state issued a levy notice and filed or threatened a lien.
The state threatened to suspend your sales tax permit or business license.
The business is under audit, or the comptroller is asking about responsible persons.
The business closed with unpaid sales tax still owed.
Sales tax money was used for payroll, rent, vendors, or other business expenses.
You have received multiple notices, or there is a court date, subpoena, or investigator contact.
Common Texas Sales Tax Cases We Review
If any of these sound like your situation, a confidential review is worth more than a recalculation:
A restaurant or retailer collected sales tax but used the funds for payroll, rent, or vendors.
A contractor, shop, or seller missed multiple filing and paying obligations across several report periods.
The business closed with unpaid Texas sales and use tax still owed.
The comptroller issued a sales tax audit assessment.
An owner or officer received a personal-liability / responsible-person questionnaire.
The sales tax permit or business license was threatened or held.
A bank levy or lien was filed against the business.
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Texas
sales tax penalty FAQ
How are sales tax penalties calculated in Texas?
Texas penalties are calculated as a percentage of the tax due for the period. A 5% penalty applies when tax is paid 1–30 days after the due date; a 10% penalty applies when paid more than 30 days late. Each late report also carries a flat $50 penalty. If a Notice of Tax/Fee Due is issued and goes unpaid, an additional 10% penalty is added, bringing the maximum to 20%.
What is the Texas Notice of Tax/Fee Due, and how does it change the penalty?
The Notice of Tax/Fee Due is a billing issued by the comptroller when a taxpayer has unpaid sales tax. If the balance shown in the notice is not paid by the date referenced, an additional 10% penalty is assessed on top of any existing late-payment penalty, bringing the total to 20% of the tax due. A prompt response to any notice from the comptroller's office is strongly advisable.
Does Texas charge interest on unpaid sales tax?
Yes, interest begins to accrue on the 61st day after the due date of a required report. The interest rate equals the prime rate plus 1 — currently 7.75% per year for 2026. To calculate interest, multiply the tax due by the annual rate, then multiply by the number of days accrued, and divide by 365. Interest continues until the balance is paid in full.
What happens if I file my Texas sales tax return late?
A late filing triggers a $50 penalty per report, plus a percentage penalty on any tax due. A 5% penalty applies if the tax is paid within 30 days after the due date; a 10% penalty applies if paid more than 30 days late. If no return is filed, the comptroller's office issues an estimated billing and may take collection actions, including permit suspension.
What happens if I filed on time but paid the Texas sales tax late?
Paying sales tax late — even when the sales tax return was filed on time — triggers a 5% penalty if paid 1–30 days after the due date, or 10% if paid more than 30 days late. Interest begins to accrue on the 61st day. If the comptroller then issues a notice that goes unpaid, an additional 10% penalty applies, and collection actions may follow.
Can Texas waive sales tax penalties?
Yes, it can, but a waiver of penalty is not automatic. The comptroller reviews your filing and payment history, the reason for noncompliance, and whether you are currently compliant. A waiver request requires that all taxes be paid and all returns be filed. If the waiver is denied, collection actions continue. Businesses are generally limited to one waiver every two years. Requests are submitted using Form 89-224 or Form 89-225.
Can I get a payment plan for unpaid Texas sales tax?
Yes, the comptroller considers payment plans on a case-by-case basis. A plan may help avoid some immediate collection actions, but the account remains delinquent — liens will still be filed, and billing notices will continue. Eligibility depends on the amount owed, whether all returns are filed, and your compliance history. Contact the comptroller's office directly or visit a local field office to discuss your account and available options.
What if I collected Texas sales tax but did not remit it?
Collected but unremitted sales tax is treated as trust-fund tax — money that belongs to the state, not the business. Under Tax Code §151.7032, intentionally or knowingly failing to collect and remit sales tax is a criminal offense. Amounts of $1,500 or more may be prosecuted as a felony. Responsible persons may be assessed personally, and civil penalties apply in addition to the unpaid tax, interest, and standard penalties.
Can Texas hold me personally liable for business sales tax debt?
Yes, under Tax Code §111.016, responsible individuals — including officers, managers, directors, and partners — who willfully failed to remit collected sales tax may be assessed personally. A 50% fraud penalty can also apply to individuals who participated in a scheme to evade taxes. Dissolution of a business does not eliminate personal liability. The comptroller can pursue responsible persons even after the business closes.
What if my business is closed?
Closing a business does not erase unpaid sales tax obligations. The comptroller can still pursue the entity for delinquent returns and unpaid balances, and may assess responsible persons personally where trust-fund tax was collected. Final returns, unfiled periods, and a past-due balance remain active collection targets after closure. Understanding your full exposure before the comptroller makes contact is always preferable — waiting typically narrows your options.
What if I received a Texas sales tax audit assessment?
A comptroller audit assessment may include additional tax, penalties, and interest beyond what this calculator reflects. Common audit findings include underreported sales, missing exemption certificates, cash-sale discrepancies, and back taxes from nexus in Texas going unaddressed. A notice of determination includes the amount due and your appeal rights. You have 30 days to request a redetermination hearing — missing that deadline can make the assessment final and immediately collectible.
Is unpaid Texas sales tax a criminal issue?
Most unpaid sales tax cases are civil, not criminal. However, under Tax Code §151.7032, intentionally or knowingly failing to remit collected Texas sales tax is a criminal offense. Amounts of $1,500 or more constitute a felony, with the degree of the felony scaling up based on the total amount involved. Criminal exposure is most likely where large amounts were collected and deliberately diverted over time.
How accurate is this calculator?
This calculator estimates Texas sales tax penalties — the $50 late-report penalty, the tiered 5%/10% late-payment penalty, the additional 10% notice penalty, and accrued interest — using verified comptroller rate data for 2010–2026. It does not calculate fraud penalties, EFT penalties, or audit deficiency amounts. For any case involving a comptroller assessment or delinquent tax obligations across multiple report periods, a professional review will produce a more complete picture.