A Florida sales tax audit is a Department of Revenue review of the sales, purchases, and tax you reported over a defined period, and it moves through a predictable sequence: a 60-day advance notice, a records review and fieldwork phase, preliminary findings, and a formal Notice of Proposed Assessment that you have 60 days to protest. What determines your outcome is less the audit itself than how ready your records are and how well you use each deadline along the way.
Why Your Business Was Selected
Audits are rarely random. The most common trigger is a mismatch between your Florida sales tax returns and other data the state can see, like federal income tax returns or bank deposits. Report $800,000 in gross receipts to the IRS but remit sales tax on only $400,000, and the gap gets flagged. The DOR also benchmarks you against industry averages, so a restaurant collecting noticeably less tax per dollar of revenue than similar restaurants nearby draws attention.
Other flags include a history of late filings, unusually large or frequent refund claims, and prior compliance issues. Restaurants, construction, and commercial real estate see audits more often because the DOR treats those industries as higher risk for noncompliance.
The 60-Day Notice Period
The audit formally starts when the DOR mails a Notice of Intent to Audit Books and Records (Form DR-840). The notice identifies the specific taxes and the period under review.1Florida Department of Revenue. What to Expect from a Florida Sales and Use Tax or Communications Services Tax Audit The DOR cannot begin any audit work until the 60-day notice period expires, which gives you a defined window to organize records.2Florida Department of Revenue. Sales and Use/Communications Services Tax Audit Timeline
Those 60 days go fast. This is where most businesses either set themselves up well or dig a hole. Use the window to pull together the records listed on the tax records guide attached to Form DR-840. If you wait until the auditor arrives and start scrambling, you lose the ability to present your transactions in the best light.
Records the Auditor Will Ask For
The DOR wants to see everything that lets it reconstruct your sales, purchases, and tax collections. At a minimum, expect requests for:
- General ledger, cash receipts and disbursement journals, and bank statements so the auditor can reconcile reported sales with actual deposits.
- Copies of all filed Florida sales tax returns (Form DR-15) for the audit period.
- Federal income tax returns for the corresponding years.
- Resale and exemption certificates for every sale where you did not collect tax.
Exemption certificates are where auditors find the most money. If a customer told you a purchase was exempt and you didn’t collect tax, the burden is entirely on you to produce a valid certificate proving that exemption. A missing certificate means you owe the tax yourself, plus penalties and interest, even though the customer was the one who should have paid. There is no grace period or “we’ll track it down later” exception during an audit.
Florida requires businesses to keep records for at least three years, matching the standard audit statute of limitations. If the DOR believes a prior return was substantially incorrect or was never filed, the look-back period can extend further.
What Happens During Fieldwork
Entrance Conference
The audit kicks off with an entrance conference where the auditor explains the scope, timeline, and tax periods being reviewed. Expect questions about how your business operates, your accounting system, who handles tax reporting, and how you decide whether a transaction is taxable. This is not small talk. The auditor is building a map of where errors are most likely to appear.
Sampling and Records Review
During fieldwork, the auditor works through your records, comparing what you collected and remitted against what you should have. When transaction volume is large, the auditor will often use statistical sampling instead of reviewing every invoice. The auditor picks a representative subset, calculates the error rate in that sample, and projects the results across the full audit period. That projection can work for or against you. If your sample happened to include an unusually messy quarter, the projected liability can be inflated beyond what a full review would show, which is why complete records for every period matter.
The auditor may also interview employees who handle sales, purchasing, or bookkeeping to understand your internal controls and spot areas where tax was likely undercollected.
Preliminary Findings and Exit Conference
Once fieldwork wraps up, the DOR issues a Notice of Intent to Make Audit Changes (Form DR-1215) summarizing the auditor’s findings and proposed adjustments.1Florida Department of Revenue. What to Expect from a Florida Sales and Use Tax or Communications Services Tax Audit This is not a final bill. It is your chance to review the findings, provide additional documentation, and challenge assumptions the auditor made. An exit conference follows, where the auditor walks you through the proposed assessment and answers questions.
The Notice of Proposed Assessment
After the exit conference, the DOR issues the formal Notice of Proposed Assessment (NOPA). The NOPA lists the additional tax owed, the interest that has accrued, and any penalties. It also starts the clock on your response options.
You have 60 days from the date of the NOPA to file a written protest. Do nothing within those 60 days and the proposed assessment becomes a final, collectible debt. That deadline is firm. Missing it eliminates your ability to challenge the assessment through the DOR’s internal process, and the department can begin collection activity from there.
Penalties and Interest
Financial exposure in a sales tax audit goes well beyond the unpaid tax itself. Penalty rates escalate based on the type of noncompliance:
- Late filing or late payment: 10% of the unpaid tax, with a minimum penalty of $50 per return.3Online Sunshine. Florida Statutes 212.12 – Dealer’s Credit, Penalties, Estimated Tax
- Failure to disclose tax on a return: 10% of the undisclosed tax for the first 30 days, plus an additional 10% for each subsequent 30-day period, up to a maximum of 50%.3Online Sunshine. Florida Statutes 212.12 – Dealer’s Credit, Penalties, Estimated Tax
- Fraud or willful evasion: 100% of the unreported tax, plus potential felony charges.3Online Sunshine. Florida Statutes 212.12 – Dealer’s Credit, Penalties, Estimated Tax
Interest accrues on unpaid tax from the date it was originally due, not from the date of the assessment. On a three-year audit, that means interest has been running the entire time. The DOR uses a floating interest rate that adjusts periodically, so the effective rate depends on when the liability arose.
Protesting the Assessment
If you disagree with the NOPA, your written protest has to be filed within that 60-day window. Identify each item you’re contesting and explain why, supported by any additional documentation you have. Vague objections don’t accomplish much. The more specific you are about which line items are wrong and why, the better your chances of getting an adjustment.
The DOR’s Technical Assistance and Dispute Resolution unit handles initial protest review. If the dispute isn’t resolved at that level, you can escalate to a formal administrative hearing through the Division of Administrative Hearings (DOAH), or in some cases pursue the matter in circuit court. The formal hearing route is a structured legal process with an administrative law judge, and most businesses bring in a tax attorney or consultant by that stage.
The alternative is to accept the assessment and arrange payment. If you can’t pay in full, the DOR offers compliance payment agreements, though interest continues to accrue on the unpaid balance.
Getting Penalties Reduced
The DOR has authority to compromise penalties when noncompliance resulted from reasonable cause rather than willful neglect or fraud. The standard is whether the taxpayer exercised ordinary care and prudence but was still unable to comply.4Florida Department of Revenue. Grounds for Reasonable Cause for Compromise of Penalties – Rule 12-13.007 F.A.C.
When evaluating penalty relief during an audit, the DOR considers whether you’ve been audited before on the same issue, how large the deficiency is relative to the tax you did correctly report, whether you collected tax from customers but failed to remit it, and whether you’ve put controls in place to prevent the same problem going forward.4Florida Department of Revenue. Grounds for Reasonable Cause for Compromise of Penalties – Rule 12-13.007 F.A.C. Collecting tax and pocketing it is treated far more seriously than making an honest classification error.
Reasonable cause can also be established if you relied on written advice from a competent Florida tax professional or from the DOR itself. The key word is “written.” Informal verbal guidance from an accountant or a DOR employee won’t qualify. You need to show you sought timely advice, disclosed all material facts, and actually followed the written advice you received.4Florida Department of Revenue. Grounds for Reasonable Cause for Compromise of Penalties – Rule 12-13.007 F.A.C.
Other recognized grounds include illness or incapacity that directly prevented compliance, natural disasters, accidental destruction of records by fire, and situations where genuine ambiguity in the law made it unclear whether tax was owed.
If the DOR Hasn’t Contacted You Yet: Voluntary Disclosure
If you know you have a Florida sales tax liability but the DOR hasn’t contacted you, the Voluntary Disclosure Program offers a materially better outcome than waiting for an audit notice. Anyone with an outstanding tax liability who has not been previously contacted by the DOR about it is eligible.5Florida Department of Revenue. Voluntary Disclosure Program
When you pay the tax and interest through voluntary disclosure, all penalties are waived, unless you collected tax from customers and failed to remit it, in which case a reduced 5% penalty applies. The DOR also limits its look-back to three years before your disclosure request, rather than the longer periods it could pursue in a standard audit.5Florida Department of Revenue. Voluntary Disclosure Program
One important boundary: the program is not available for delinquencies that are “obvious and would routinely generate a billing.” If you’re registered, have been filing returns, and simply underreported on those returns, voluntary disclosure likely won’t apply. The program is primarily designed for businesses that should have been collecting Florida sales tax but never registered or filed at all. And once the DR-840 arrives, this door closes.
Statute of Limitations and Extension Requests
The standard window for the DOR to assess additional tax is three years from the date the return was filed. For returns that were never filed or were substantially incorrect, there is no time limit.
During an audit, the DOR may ask you to sign a Consent to Extend the Time to Issue (Form DR-872), which pushes the statute of limitations to a later, mutually agreed date. This request usually comes when the audit is taking longer than expected and the three-year window is closing. Signing gives you more time to gather documentation and negotiate, but it also gives the DOR more time to finalize a larger assessment. Some auditors will make clear that if you decline the extension, they’ll issue an immediate assessment based on whatever information they have. Whether to sign depends on how strong your documentation is and whether more time genuinely helps your position.
Where Auditors Typically Find Money
A handful of categories account for the majority of audit assessments. Knowing where auditors focus lets you shore up those areas before fieldwork begins:
- Missing exemption certificates. The single biggest source of audit liability. No valid certificate for a tax-free sale, no exemption.
- Use tax on purchases. When you buy taxable goods or services from an out-of-state vendor that doesn’t charge Florida sales tax, you owe use tax. Businesses regularly overlook this on office supplies, software, and equipment bought online.
- Commercial rent. Florida taxes commercial real property rentals, and the rules trip up landlords and tenants. Related-party rent (one entity paying the mortgage or property taxes on a building occupied by a related business) and common area maintenance charges passed through to tenants are frequent assessment areas.
- Taxable services misclassified as exempt. Florida taxes certain services, including commercial pest control, cleaning, and nonresidential security. These sometimes get treated as exempt when they aren’t.
Tightening the exemption certificate file, reviewing use tax on out-of-state purchases, and double-checking the treatment of commercial rent and taxable services before the auditor arrives eliminates a large share of what would otherwise become assessed tax.