You run a business in Sanford or Altamonte Springs, and every month the sales tax filing deadline lands on your desk with the same question: what rate do I use, and am I filing the DR-15 correctly? The DR-15 is Florida’s Monthly Sales Tax Return form, and for Seminole County businesses, it’s the one document that connects your sales activity to the Florida Department of Revenue. You don’t need a CPA to file it—you need clarity on how the county surtax works, what goes on the form, and what mistakes trip up most owners. This guide walks you through the filing process step by step, so you can either handle it yourself or hand it to your accountant with confidence.
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Does this apply to your business in Florida?
If you made sales of tangible personal property or certain services in Seminole County in the past month, you must file a DR-15 return by the 20th of the following month. The Florida Department of Revenue requires all sales tax registered businesses to report. In Florida, tangible personal property is generally taxable unless specifically exempt by statute, while services are not taxable unless listed in statute—so your first step is knowing which category your revenue falls into.
How the rate works
Florida’s sales tax structure has two layers: the state imposes a 6% base rate, and Seminole County adds its own surtax on top. The combined rate is not the same in every part of Florida, and it varies even within a county depending on local ordinances. Rather than guess the exact current combined percentage for your city, check the Florida Department of Revenue rate calculator or confirm with their office before filing. This ensures you apply the correct rate to each line of the DR-15 and avoid reporting errors that can cascade into adjustments later.
How to file step by step
The DR-15 is filed online through the Florida Department of Revenue website. Start by logging into your Florida sales tax account. You’ll be prompted to enter your reporting period (the calendar month) and your sales figures. The form asks you to report total sales, taxable sales, sales tax collected, and any applicable credits or adjustments. You then calculate the tax owed by multiplying your taxable sales by the combined rate (6% state plus Seminole County surtax). Once you’ve entered all figures, review them carefully—this is where most errors happen—then submit. The deadline is always by the 20th of the following month. If you’re unsure about how to categorize a specific sale, this is where a step-by-step walkthrough on the basics can help; the Florida Department of Revenue’s role is walked through step by step here.
Common mistakes
Mixing up the combined rate. Many owners use last month’s rate or apply the wrong county rate. Seminole County’s surtax can change, and if you file with the wrong combined percentage, your return will show a discrepancy. Always confirm the current rate on the Florida Department of Revenue website or calculator before filing. If you catch an error after filing, you can file an amended return (Form DR-15X) to correct it.
Forgetting to claim valid exemptions. If you made sales to a tax-exempt buyer (such as a nonprofit with a valid exemption certificate) or you sold items that are specifically exempt under Florida law, you should not have collected tax on those sales. Leaving them in your taxable column inflates your tax liability. Keep copies of all exemption certificates and exclude those sales from your taxable total when you file.
Late filing or late payment. If you miss the 20th of the following month, the Florida Department of Revenue may impose a late-filing penalty and interest on any unpaid tax. Missing the deadline is easier to avoid than correcting: mark your calendar or set a reminder on the 15th, well before the 20th.
Entering zero sales when you made sales. Some owners skip the filing if sales were slow or they forget to add up all sales channels. The Department of Revenue expects a return every month, even if it shows zero or small sales. Filing consistently and on time builds a clean record and makes it harder to have a filing gap misinterpreted as avoidance.
Frequently Asked Questions
What if I operate in both Seminole County and another county in Florida?
Each county has its own surtax rate. You’ll need to split your sales by county and file separate returns (or combined returns with separate county breakouts) depending on how your sales activity was documented. If you use point-of-sale software or accounting tools that track sales by location, this becomes much simpler. Having clean data from the start—organized by county and by taxability—saves hours at filing time.
Can I file the DR-15 on paper instead of online?
Florida allows e-filing and paper filing, but online filing is faster and reduces transcription errors. Paper forms are available from the Florida Department of Revenue, but you’ll still need to mail them and wait for processing. E-filing through their portal is the standard and gives you an instant confirmation receipt.
What happens if my taxable sales don’t match my bank deposits?
Sales and cash deposits are often different because of returns, discounts, sales on credit, and non-taxable income (like loan proceeds). Start by listing all sales for the month, then subtract returns and non-taxable items, then apply the combined tax rate. If the mismatch is large, review your accounting records to find where the gap is—this is a sign that your categorization needs work, not that you’re doing anything wrong.
Do I need to file a DR-15 if I have no sales?
Yes. The Department of Revenue expects all registered sellers to file a return each month, even if your return shows zero sales and zero tax due. This keeps your account in good standing and prevents a filing gap that could trigger compliance notices.
What’s the difference between the DR-15 and the DR-15X?
The DR-15 is your regular monthly return. The DR-15X is an amended return you file if you discover an error on a previous return. You should file the X version if you miscategorized sales, applied the wrong rate, or omitted an exemption in a prior month. The sooner you amend, the easier it is to clear up with the Department of Revenue.
This article is for general educational purposes and isn’t a substitute for advice from a licensed CPA or tax attorney. Rules vary by jurisdiction and change over time — always confirm current requirements with the Florida Department of Revenue or your advisor.
Filing the DR-15 in Seminole County is straightforward once you understand the county rate structure and know what to enter on each line. The real power is in staying consistent: file on time, use the correct combined rate, and keep your sales data organized by category and county. When you show up month after month with clean, timely returns, your account stays in compliance and you’re never caught scrambling. Whether you manage the form yourself or hand it to a CPA, that discipline pays for itself. Explore more on how Florida sales tax rules work across the state, and you’ll have context for your Seminole County filings that makes every return faster.
This article is for general educational purposes and isn’t a substitute for advice from a licensed CPA or tax attorney. Rules vary by jurisdiction and change over time — always confirm current requirements with the Florida Department of Revenue or your advisor.
See how this fits into the bigger picture in our Florida sales tax guide, which covers county rates and filing deadlines in detail.