Ecommerce and Online Sellers in Miami

For a Miami ecommerce seller organized as a sole proprietor, a single-member LLC, a partnership, or an S corporation, the answer is no, Florida charges no state personal income tax on your store profit, and there is no Florida individual income tax return to file. This is the single biggest reason online sellers relocate to or launch in Miami, because the same profit that would be taxed up to 13.3 percent in California or around 10.9 percent plus a city tax in New York City is taxed at zero by the state of Florida. For a seller netting real money, that difference is thousands of dollars kept every year, and it compounds as the business grows.

It helps to be precise about what the absence of a Florida income tax does and does not cover, because sellers sometimes assume it means their whole tax bill is small, and it does not. Florida takes nothing from your profit at the state level, but the federal government still does. You owe federal income tax on your net profit, and if you are a sole proprietor or single-member LLC you also owe the 15.3 percent federal self-employment tax on that profit, covering Social Security and Medicare. Those federal obligations exist for a Miami seller exactly as they would for a seller anywhere else, so you still need to fund federal quarterly estimated payments and file a federal return. What you skip is the state income layer, not the federal one.

There is one Florida tax on business income, but it does not reach most sellers. Florida levies a corporate income tax at 5.5 percent, and that applies only to entities taxed as traditional C corporations. A sole proprietor, a partnership, and an S corporation are not subject to it on their pass-through income, so unless you have specifically chosen C corporation treatment, which most online sellers have not, Florida collects no income tax from your business at all. The practical result is that your Florida obligations are administrative, centered on collecting and remitting sales tax correctly, rather than a tax on what you earn.

Here is a worked example that shows the edge. Two sellers each net $150,000 from their stores, one in Miami and one in Los Angeles. The Los Angeles seller pays California income tax on that profit at graduated rates that reach into the 9 to 10 percent range at that income, easily $12,000 or more to the state, on top of federal tax. The Miami seller pays the state nothing on the profit, keeping that entire amount, while both pay the same federal income tax and self-employment tax. That state-level gap is the Miami advantage in plain numbers. Our job is to make sure it is not quietly given back through a federal planning mistake, so we handle the federal estimates and the entity structure through tax strategy consulting. The state rules are with the Florida Department of Revenue, and the federal small business framework is in IRS Publication 334.

For a Miami ecommerce seller, sales tax collection outside Florida turns on economic nexus, the rule the Supreme Court upheld in South Dakota v. Wayfair in 2018. Before that decision a state could only require you to collect its sales tax if you had physical presence there, an office, an employee, or inventory sitting in a warehouse. After Wayfair a state can require collection based purely on how much you sell into it, with no physical footprint at all. That is why a seller working out of Miami can suddenly owe collection duties in a dozen states, and it is the first thing we check for a new online seller.

Most states adopted a threshold modeled on the one the Court approved, $100,000 of sales into the state or 200 separate transactions, measured over the current or prior year. Florida itself uses $100,000 of prior-year sales with no transaction count for out-of-state sellers reaching into Florida. The specifics vary from state to state in ways that matter, because some use only the dollar figure, several have dropped the transaction count, and the categories of sales that count toward the threshold differ. There is no single national rule, which is exactly why this is hard to self-manage as a store grows into new markets.

Marketplace facilitator laws are the piece that keeps this manageable. Nearly every state now requires the marketplace itself, Amazon, Etsy, Walmart, eBay, to collect and remit the tax on the sales it processes, so your Amazon and Etsy orders are largely handled by the platform, and in many states those facilitated sales still count toward your own economic nexus threshold. The exposure lives in the sales the marketplaces do not cover, chiefly your own Shopify store or anything you sell direct where you are the merchant of record.

Here is how it plays out. Say your Shopify store ships $130,000 of product into Georgia this year across 900 orders. You have blown past the $100,000 economic nexus threshold, so you are required to register with Georgia, collect its sales tax on taxable orders shipped there, and file returns. If you do not notice until eighteen months later, you owe the uncollected tax out of your own pocket plus penalties and interest, because the duty existed whether or not you charged customers. On a $130,000 base at roughly 7 percent that is around $9,000 of tax you may have to eat, before penalties. Meanwhile at home you are collecting Florida sales tax at 6 percent plus the Miami-Dade surtax on taxable orders delivered into the county, which is its own return to keep current. The thresholds also move as you grow, so a state you sold $70,000 into last year is fine, but the same store shipping $115,000 into that state this year crosses the line partway through the year, and the duty to collect begins from the crossing date rather than the next January. That is why we watch the running state totals instead of checking once at filing time. We track your sales by state through tax compliance and register you the moment a state actually requires it, so you collect from customers rather than paying the tax yourself out of margin later. Florida administers the tax through the Florida Department of Revenue, and the decision itself is in the Wayfair opinion.

For a Miami ecommerce seller, the Florida sales tax is a two-part number, and getting the second part right is where sellers slip. The first part is the statewide sales and use tax, which Florida sets at 6 percent and applies to most retail sales of tangible goods delivered to a Florida address. The second part is the discretionary sales surtax, a local add-on that each county can impose on top of the state rate, and Miami-Dade County levies one. So a taxable order delivered into Miami-Dade is taxed at 6 percent plus the county surtax rate, not at a flat 6 percent, and orders you ship to other Florida counties carry whatever surtax those counties impose, which is not always the same.

The surtax has a feature that surprises sellers, because it does not always apply to the full price of an item the way the state rate does. Florida limits the discretionary surtax on the sale of a single item of tangible personal property to the first portion of the sales price, so on a large-ticket item the surtax stops applying above a set amount while the 6 percent state tax continues on the whole price. For a store selling lower-priced goods this rarely comes up, but for one selling expensive items it changes the tax on each sale, and applying the surtax to the entire price of a high-value item overcharges the customer and misstates your return.

The sourcing rule for a Florida seller shipping within the state is destination based, meaning the surtax is generally determined by where the customer receives the goods, not where your business sits. So if you operate from Miami but ship an order to a customer in a different Florida county, you apply that county’s surtax rate, or none if that county has not adopted one. This is the same kind of destination sourcing that makes multi-state compliance complicated, except here it plays out county by county inside Florida, and it is easy to get wrong if your platform is set to a single Miami-Dade rate for every Florida order.

Here is a worked example. Your Shopify store, based in Miami, sells $200,000 of taxable goods delivered within Florida in a year, of which $150,000 goes to Miami-Dade addresses and $50,000 to other Florida counties. On the Miami-Dade portion you collect 6 percent state tax plus the county surtax, and on the rest you collect 6 percent plus whatever each destination county imposes. If your store instead charged a flat 6 percent to every Florida order, you would have undercollected the surtax on the in-county sales and still owe it to the state out of your own pocket, or overcharged customers in no-surtax counties. We set the tax rules so each Florida order is taxed by its destination, keep the Florida return filed on the schedule the state assigns, and reconcile the collected tax to what you remit through tax compliance. The state rules are on the Florida Department of Revenue sales tax page, and the surtax detail is on the Discretionary Sales Surtax page.

For a Miami ecommerce seller, inventory and cost of goods sold are still the heart of the tax picture even though Florida charges no state income tax, because the number drives your federal income tax and your self-employment tax, which do not care that you live in a no-tax state. The core rule is that buying inventory is not a deductible expense. When you spend $40,000 restocking product, you have not lost $40,000, you have converted cash into an asset that sits in a warehouse. That purchase only becomes a deduction, as cost of goods sold, when the specific units actually sell. Until then it stays on your balance sheet as inventory, and no amount of cash leaving your account changes that.

Sellers who ignore this and expense every purchase when the money leaves their account produce financial statements that are fiction. In a heavy buying quarter they show a loss they did not really have, then in the next period they show inflated profit because the sold goods carry no recorded cost. The tax consequence is a rollercoaster, a low federal bill in a stocking year followed by a brutal one later, all because the timing of deductions was tied to cash instead of to sales. The Miami seller is spared the state-tax half of that swing, but the federal half, income tax plus 15.3 percent self-employment tax for a sole proprietor, is still very real and still moves by thousands of dollars when the number is wrong.

The mechanics run through a simple formula. Beginning inventory, plus purchases during the year, minus ending inventory, equals cost of goods sold. That means you need an accurate count and value of what is left on the shelf at year end, because ending inventory directly reduces your deduction. If you carry $60,000 of unsold product on December 31, that $60,000 is not deductible this year no matter how much cash you spent. Your valuation method matters too, because first-in first-out and a weighted average produce different COGS and different ending values when supplier prices move, which is why we choose the method deliberately rather than by accident.

Here is the worked example. You start the year with $50,000 of inventory, buy $200,000 more, and finish with $60,000 on hand. Cost of goods sold is $50,000 plus $200,000 minus $60,000, which is $190,000. On $400,000 of sales your gross profit is $210,000 before operating expenses, a clean and defensible figure. The seller who deducted the full $200,000 and ignored the $60,000 still in the warehouse overstated the deduction by $60,000, and the federal tax cost of that error, income tax plus self-employment tax, easily runs past $15,000. Landed cost adds a layer for importers, and many Miami sellers import through the port, so customs duties, freight, and inbound shipping belong in inventory value, not a separate expense bucket. We build the whole COGS schedule as part of your monthly financial reporting so the number is right all year, not reconstructed in April. The federal standards for inventory and accounting methods are in IRS Publication 538 and Publication 334.

The Form 1099-K is the information return that payment processors and online marketplaces file with the IRS to report the gross payments they ran through for you, and for a Miami ecommerce seller it is a frequent source of panic and mismatched returns even though there is no Florida income tax in the picture. For 2026 the reporting threshold reverted to its long-standing level, so a platform must issue you a 1099-K once you exceed $20,000 in gross payments and more than 200 transactions in the year. Earlier plans to drop the threshold to a much lower figure were reversed, so many smaller sellers will not receive the form at all, though that changes nothing about the duty to report income you actually earned on your federal return.

That last point matters, so it bears stating plainly. The 1099-K threshold governs whether a form gets mailed, not whether the income is taxable. Every dollar your store earns is reportable on your federal return whether or not a 1099-K arrives. If you do $18,000 in sales and receive no form, that $18,000 still belongs on your return. There is no Florida income tax return for it to flow into, which simplifies things for a Miami seller, but the federal reporting duty is unchanged, and treating the threshold as a floor below which income is tax-free is how sellers end up with underreported federal income and an unpleasant letter a year or two later.

The reconciliation problem is the bigger one. A 1099-K reports gross payments, the total buyers paid before anything was netted out. That gross includes the marketplace referral fees the platform kept, payment processing fees, sales tax that was collected, and shipping charges you collected and paid to carriers, and it is stated before any refunds you issued. If you report only what landed in your bank account, your revenue will be far below the gross the IRS was handed, and that gap is a classic audit flag. The fix is not to report the inflated gross either, because you never kept it. The fix is to report true gross revenue and separately deduct every fee, refund, and pass-through so the return reconciles cleanly to both the 1099-K and your bank statements.

Here is the math on a real case. Your Amazon 1099-K shows $250,000 of gross payments. Of that, $45,000 was Amazon referral and fulfillment fees, $15,000 was refunds to customers, and $12,000 was sales tax Amazon collected and remitted for you. Your true product revenue is around $223,000 after backing out the sales tax that was never yours, and the $45,000 of fees and $15,000 of refunds are legitimate reductions a careless return would miss. Reported correctly, you are taxed on real profit rather than the $250,000 headline, and while there is no Florida income tax to worry about, the federal tax difference on that gap still runs into five figures.

We perform this reconciliation on every ecommerce return and tie it to the bookkeeping so the numbers already agree before filing, which also means that if the IRS questions the gap between your 1099-K and your reported revenue, the answer is documented line by line rather than rebuilt under pressure. For a Miami seller the reconciliation is purely a federal exercise, without a second state layer to untangle, which is one more way the no-income-tax base keeps the compliance lighter. The IRS walks through the form on its Understanding Your Form 1099-K page, and the underlying income rules are in Publication 334.