Texas Sales Tax Nexus Threshold: $500K Rule vs the $100K Standard and What It Means for Online Retailers

The Texas $500K Threshold: How It Works

Texas adopted its economic nexus rule effective October 1, 2019, following the Supreme Court's Wayfair decision. But where most states copied South Dakota's $100K/200-transaction framework nearly verbatim, Texas went its own way. The Texas Comptroller of Public Accounts set the threshold at $500,000 in total Texas revenue during the preceding 12 calendar months.

There is no transaction-count alternative. A seller who ships 10,000 orders to Texas totaling $450K has no economic nexus. A seller who ships 50 orders totaling $510K does. The threshold is purely revenue-based, measured on a rolling 12-month lookback. This makes Texas one of the most seller-friendly large states for economic nexus purposes — and one of the easiest to overlook when you are scaling past it.

The $500K figure applies to gross receipts from taxable sales and services delivered into Texas. This includes sales of tangible personal property, digital goods, and taxable services sourced to Texas. Once a remote seller crosses the threshold, they must obtain a Texas sales tax permit and begin collecting tax on the first day of the fourth calendar month after exceeding $500K. This built-in grace period is more generous than most states, which require collection to begin immediately or within 60 days.

Texas vs the $100K/200-Transaction Standard

The Wayfair decision established that states could require remote sellers to collect sales tax based on economic activity — without physical presence. South Dakota's $100K or 200-transaction threshold became the template. The five Tier-A states (Florida, Georgia, Arizona, North Carolina, Pennsylvania) all adopted variations of this $100K standard. Texas did not.

The practical impact is significant. A seller doing $150K in remote sales to a single state has nexus in every Tier-A state — but is only 30% of the way to the Texas threshold. The gap becomes even wider when you factor in marketplace facilitator exclusions: if half of that $150K goes through Amazon, the threshold-relevant Texas revenue drops to $75K. Texas essentially does not exist as a compliance concern for most sellers until they are well into seven-figure total revenue.

The absence of a transaction-count prong matters too. Georgia and North Carolina trigger nexus at 200 transactions regardless of dollar amount. A seller of low-cost items — phone cases, stickers, craft supplies — can hit 200 transactions in those states on $15K in revenue. That same seller could process 5,000 transactions in Texas at $10 each ($50K total) and remain well below the $500K line. For high-volume, low-AOV sellers, Texas is one of the last states to require registration.

Decision Matrix: $300K Seller Across Six States

Consider an online retailer — call them ShopDirect — doing $300K in total annual remote sales across six states. ShopDirect sells home goods through both its own Shopify store and Amazon. Of the $300K, $180K comes through the Shopify store (direct sales) and $120K through Amazon (marketplace-facilitated). Here is how nexus breaks down state by state.

ShopDirect has nexus in Georgia and North Carolina — triggered by transaction count, not revenue. The seller has no nexus in Florida, Pennsylvania, Arizona, or Texas. Notice that Texas is the furthest from triggering: even counting all $50K in total Texas revenue, ShopDirect is at 10% of the Texas threshold. On direct sales alone ($30K), they are at 6%.

Texas Sales Tax Rate and Filing Cadence

Once a remote seller crosses the $500K threshold and obtains a Texas sales tax permit, they must collect and remit tax at the destination rate. Texas is a destination-based sourcing state for remote sellers, meaning you charge the combined state and local rate at the buyer's shipping address.

Texas has over 1,500 local taxing jurisdictions. Remote sellers must determine the correct combined rate for each delivery address. In practice, this means using tax calculation software — Avalara, TaxJar, or similar — rather than attempting manual rate lookups. The Texas Comptroller provides a rate lookup tool, but it is not practical for high-volume sellers processing hundreds of orders daily.

Filing Frequency

The Texas Comptroller assigns filing frequency based on the amount of tax you collect. New remote sellers are typically assigned monthly or quarterly filing. The general framework is:

• Monthly: Tax liability of $500 or more per month (most common for sellers above $500K)
• Quarterly: Tax liability between $100 and $500 per month
• Annually: Tax liability under $100 per month (rare for sellers at the $500K level)

Returns are due on the 20th of the month following the reporting period. Texas offers a timely-filing discount of 0.5% of the tax due (capped at $2,083 per month for monthly filers) when returns are filed and paid on time. For a seller collecting $3,000/month in Texas sales tax, that discount is $15/month — modest but worth claiming through timely compliance.

Marketplace Facilitator Rules in Texas

Texas enacted its marketplace facilitator law effective October 1, 2019 — the same date as its economic nexus rule. Under this law, marketplace facilitators that meet the $500K threshold in Texas must collect and remit sales tax on behalf of their third-party sellers. All major platforms — Amazon, Etsy, Walmart Marketplace, eBay, Shopify's Shop channel — qualify and are currently collecting Texas sales tax.

For sellers, this creates a clean separation. Sales made through a qualifying marketplace are the platform's responsibility. You do not collect tax on those sales, you do not report them on your Texas return, and — critically — they do not count toward your personal $500K threshold. Only direct-channel sales count.

This separation is especially powerful in Texas because of the high threshold. A seller doing $800K in total Texas sales — $500K through Amazon and $300K direct — has no personal nexus obligation in Texas. Amazon handles the $500K. The seller's threshold-relevant revenue is $300K, well below $500K. The same seller in a $100K state would have nexus on the $300K in direct sales alone.

Common Mistakes Mid-Size Sellers Make With Texas

Mistake 1: Assuming $100K Is Universal

The most common error is treating $100K as the default threshold everywhere. Sellers who have gone through the registration process in Florida, Georgia, and other Tier-A states internalize $100K as the magic number. They see $100K in Texas sales and panic — or worse, register prematurely and begin filing unnecessary returns. Texas does not require registration at $100K. Voluntary registration creates an ongoing filing obligation with no benefit if you were not required to register.

Mistake 2: Including Marketplace Sales in the Threshold

Sellers who calculate their Texas threshold by adding all channels together overstate their exposure. If your Shopify dashboard shows $200K in Texas orders and your Amazon Seller Central shows $300K in Texas orders, your threshold-relevant Texas revenue is $200K — not $500K. The Amazon sales are the platform's responsibility. Many sellers discover they are years away from the Texas threshold once they exclude marketplace-facilitated revenue.

Mistake 3: Ignoring Texas Entirely Because the Threshold Is High

The opposite error. Fast-growing DTC brands can cross $500K in a single state faster than they expect. A seller doing $2M in total remote sales with 25% of revenue from Texas — not unusual given Texas is the second-largest state by population — has $500K in Texas revenue on direct sales alone. Growth-stage sellers should track Texas revenue monthly and set an alert at $400K to begin the registration process.

Mistake 4: Forgetting the Four-Month Grace Period

Texas gives sellers until the first day of the fourth month after crossing $500K to begin collecting. Some sellers miss this window and begin collecting late, creating a liability gap. Others start collecting immediately after crossing the threshold, which is allowed but not required. The grace period exists to give you time to register and configure systems — use it, but do not exceed it.