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Black Friday and Cyber Monday sales tax: A 2026 compliance checklist

Black Friday and Cyber Monday (BFCM) can bring a welcome surge in orders. Increased sales may also create new sales tax obligations or change your existing obligations.

A strong holiday season could push your business over an economic nexus threshold in one or more states. It may also affect your filing frequency, require you to register for a new sales tax permit, or create additional reporting responsibilities.

As you prepare your inventory, website, shipping operations, and customer support for the holiday rush, make sales tax part of the plan. Here’s what to review before Black Friday and Cyber Monday, what to monitor as orders come in, and what to do after the promotion ends.

How holiday sales can affect sales tax nexus

Sales tax nexus is the connection between a business and a state that allows the state to require the business to comply with its sales tax laws. A business can establish nexus through physical or economic activity.

Physical nexus can be created by activities such as having an office, employees, inventory, or another physical presence in a state.

Economic nexus can be created when a business exceeds a state’s sales or transaction threshold, even if the business has no physical presence there.

Holiday sales can be especially important because a late-year increase may push your business over a state’s threshold. Measurement periods vary by state. A state may review the current calendar year, the previous calendar year, or another defined period.

Economic nexus laws can also change. For example, Illinois removed its transaction threshold from its economic nexus requirements in 2026, leaving only the revenue threshold in place.

1. Consolidate sales across every channel

Start by understanding how much you sell into each state. Depending on the state, an economic nexus threshold may be based on sales, transaction volume, or both.

TaxJar’s Sales & Transactions Checker can help you monitor your activity without relying on spreadsheets. This free tool shows the number of transactions and total gross sales delivered into each state.

Track what you sell across all your sales channels. Economic nexus is generally measured at the state level, not separately for each sales channel. Sales from your websites, platforms, and marketplaces may all contribute to your economic nexus activity in a state.

The types of sales and activity included in economic nexus thresholds also vary. A threshold may consider:

• Gross sales
• Retail or taxable sales
• Transaction volume
• A combination of sales and transaction volume
• Current-year or previous-year activity
• Another measurement period defined by the state

Don’t assume the same standard applies everywhere. State legislatures and tax authorities can revise thresholds, definitions, and effective dates.

Pay particular attention to states where your year-to-date sales are close to the threshold. Estimate how Black Friday and Cyber Monday orders could affect those totals, then monitor actual activity during and after the promotion.

2. Keep marketplace sales and responsibilities in mind

Marketplace facilitator laws generally require qualifying marketplaces to collect and remit sales tax on the transactions they facilitate. For sellers, this means a marketplace may collect and remit tax on their behalf in states where the marketplace meets the applicable requirements.

Depending on the state, marketplace-facilitated sales may still count toward your economic nexus threshold, even when the marketplace collects and remits the tax.

For each state, determine:

• Whether marketplace sales count toward the economic nexus threshold
• Whether the marketplace collects and remits tax on your behalf
• Whether your direct sales create a separate collection obligation
• Whether you must register or file returns despite marketplace collection

Learn which types of sales count toward economic nexus thresholds, including how states may treat marketplace sales.

3. Register before collecting sales tax

If your business reaches a nexus threshold in a new state, you may need to register for a sales tax permit before collecting tax. Don’t begin collecting sales tax in a state until you have the required permit.

Use our sales tax permit guide to learn who may need a permit, how to register in each state, and where to find additional information about the registration process. If you’d rather automate registration, TaxJar can manage it for you.

4. Monitor sales during BFCM

Economic nexus monitoring shouldn’t stop when the promotion begins. Watch state-level sales and transaction totals throughout the holiday period, especially in states where your business is close to a threshold.

Monitor:

• Year-to-date sales by destination state
• Transaction counts where relevant
• Direct and marketplace sales
• Refunds and cancellations
• Exempt sales
• States approaching or crossing a threshold

Preserve reports from each platform so you can reconcile the activity later. If you cross a threshold, document when it happened. You may need that information when registering for a permit and determining when to begin collecting tax.

5. Reconcile your activity after the holiday rush

After BFCM, compare platform reports with your accounting records and recalculate your state-level totals.

Your post-holiday review should include:

• Consolidating final sales across all channels
• Rechecking sales and transaction totals by state
• Identifying states where you crossed or approached a threshold
• Confirming how marketplace transactions affect the calculation
• Beginning any required registrations
• Verifying collection start dates
• Preserving state and sales-channel reports and supporting records

Even if you didn’t cross a threshold during the promotion, continue monitoring. A state may consider current-year activity when determining your obligations in the following year.

6. Check whether your filing frequency changed

Holiday sales can also affect existing sales tax obligations. States assign filing frequencies, such as monthly, quarterly, or annually, based on factors that may include your sales volume.

If your activity increases, a state may change your assigned filing frequency. For example, a quarterly filer may be moved to a monthly schedule. Rules and schedules vary by state.

After the holiday season:

• Review notices from state tax authorities.
• Check your online tax accounts for filing-frequency changes.
• Confirm the first period covered by the new schedule.
• Add new due dates to your compliance calendar.
• Determine whether zero-dollar returns are required when no tax is due.

Don’t assume last year’s filing schedule still applies. Review your state notices and account settings so you can prepare for any newly assigned deadlines.

What if you cross a threshold without collecting?

If your review shows that your business crossed a threshold without beginning to collect tax, address the issue promptly.

Start by determining:

• When the threshold was crossed
• When the state says the collection obligation began
• Which transactions may be affected
• Whether registration or past-due returns are required
• How much tax, interest, or penalties may be due

The appropriate next step depends on the state and your circumstances. A state tax authority or qualified tax professional can help you evaluate registration, filing, payment, and potential remediation options.

Black Friday and Cyber Monday sales tax checklist

Before the promotion

• Consolidate year-to-date sales by state.
• Include every website, marketplace, and sales platform.
• Review physical and economic nexus.
• Compare activity with current state thresholds.
• Confirm how marketplace sales are treated.
• Register where required.
• Confirm filing frequencies and due dates.

During the promotion

• Monitor sales and transaction counts by destination state.
• Watch states approaching a threshold.
• Track direct and marketplace activity.
• Account for refunds and cancellations.
• Preserve reports from every sales channel.

After the promotion

• Reconcile sales across platforms.
• Recheck nexus exposure.
• Document when thresholds were crossed.
• Complete required registrations.
• Confirm collection start dates.
• Review filing-frequency changes and state notices.
• Prepare returns and retain supporting records.

Simplify holiday sales tax compliance with TaxJar

Holiday growth shouldn’t leave you guessing about where your business has sales tax obligations. TaxJar can help you monitor sales activity, identify potential economic nexus exposure, organize sales tax reporting, and automate eligible filing tasks with AutoFile.

Before the holiday season begins, start a free trial to see how TaxJar can support your sales tax compliance needs. Getting started now can help you prepare for BFCM, understand where you may have obligations, and spend less time sorting through sales tax details after the holiday rush.

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