TaxJar vs Avalara vs Shopify Tax: What a Small Store Actually Needs

Shopify Tax, TaxJar, Avalara, a filing service or doing it yourself: here's what each actually handles for a small store, where the gaps are, and when owning the tracking makes more sense.

TaxJar vs Avalara for a small Shopify store

It's one of the most searched sales tax questions for a reason. Once you realize you might owe in more than one state, the next thought is "what do I buy?"

The honest answer is: it depends on how many states you're registered in, how many channels you sell through, and how complicated your products are. Most small stores need less than the market sells them.

Here's a fair look at the five options, what each one does well, and where each one leaves work on your desk.

What any sales tax setup has to do

Before comparing tools, it helps to know the jobs. There are five:

1. Monitor nexus: track sales and orders by state against each threshold.
2. Register: apply for a permit in each state once you cross.
3. Calculate and collect: charge the right rate at checkout.
4. File and pay: submit returns on each state's schedule.
5. Keep records: so an audit is an export, not a project.

Every state with a sales tax now has an economic nexus law (Avalara, 2026), so these jobs exist for anyone selling across state lines at volume. The tools differ in which jobs they actually do for you.

Option 1: Shopify Tax (built in)

Good at: calculating and collecting at checkout, assigning product tax categories, and showing you where you may be approaching an obligation. For a single-channel Shopify store it covers a lot of job 3 and some of job 1.

Where it falls short: collection only starts in states where you've added a registration. Does Shopify handle state registration after reaching nexus? Generally no; registering with the state is on you. Filing returns isn't built in either, so you'll export reports and file, or connect a filing service. Pricing depends on your plan, so check what applies to your store.

Option 2: TaxJar

Good at: pulling sales from multiple channels into one view, nexus insights, reports by state, and automated filing in the states it supports. It's built with smaller online sellers in mind and is easy to set up.

Where it falls short: pricing scales with order volume, and automated filing is typically an added cost per return. For a store registered in only two or three states, you may be paying for more coverage than you use. Registration is usually a separate step or service.

Option 3: Avalara

Good at: depth. Large product taxability libraries, exemption certificate management, many integrations, and services for registration and filing. If you sell complex products, sell wholesale with exemption certificates, or operate in many states and countries, it's built for that.

Where it falls short for a small store: it's designed with mid-market and enterprise needs in mind, pricing is typically quoted, and add-ons stack up. Our Blueprint estimate for this whole software category is about $130 a month for a typical 10-person company. Watch usage-based fees: 66.5% of IT leaders reported unexpected SaaS charges from consumption-based pricing (Zylo, 2025).

Option 4: A filing service or your accountant

Searches like "sales tax filing service cost" and "do I need an accountant for sales tax" come up constantly.

Good at: judgment and accountability. A CPA can run a nexus study, handle product taxability, register you, and negotiate voluntary disclosure if you have back exposure.

Where it falls short: it's usually priced per state or per return, so cost grows with every registration. And they rely on you to send clean sales-by-state data. If that data is late or messy, you pay for the cleanup.

Option 5: Do it yourself

The cheapest way to file sales tax in multiple states is still filing directly on each state's website. It costs nothing but time.

Where it falls short: the time. 63% of early-stage owners say they waste at least a day a month on financial admin, and tax calculations top their list of frustrations at 54% (Tide, 2016). DIY also depends on you remembering to check thresholds, which is exactly what slips when you're busy.

Software buyers aren't always happy either way: roughly 60% of SMBs made a software purchase they regretted in the past 18 months (Capterra, 2024).

Where the real gap is

Look at the five jobs again. For a small store, collection at checkout is mostly solved by your platform. Filing is a short task once the numbers are ready. Registration happens a few times, not every month.

The job that actually causes letters from the state is job 1: monitoring. Knowing, every month, where you stand in every state on the basis that state uses. And it's getting more nuanced: 16 states dropped the 200-transaction test by 2026 while 15 still use it (Avalara, 2026).

Ask yourself one question before you buy: in the last 12 months, did any problem come from checkout charging the wrong rate? Or did it come from not knowing you'd crossed a threshold, or missing a due date? For most small stores it's the second. Buy, or build, for the problem you actually have.

That's the job worth owning outright, because it's the one that runs every single month whether you remember it or not.

What owning the system looks like

An owned tracker is built with your own AI, in your own accounts. Each month it pulls orders from every channel, totals sales and order counts by state on each state's measurement basis, compares them to thresholds you've verified, and sends a short note with alerts, due dates and return-ready numbers.

Your store keeps calculating tax at checkout. You or your accountant still register and file. But you replace the subscription you'd otherwise pay for the watching and the reports, and you keep the system forever.

If you later grow into dozens of states or complex products, a full platform may make sense. Start with the job that's actually causing the risk.

A practical way to decide: count the states you're registered in today and the ones you're watching. Under five, with one or two channels and simple products, a tracker plus direct filing is usually plenty. Past that, or with wholesale and exemption certificates in the mix, compare the full platforms on what they'd actually cost at your order volume, including filing add-ons.

Questions owners ask

Is TaxJar or Avalara better for a small Shopify store?

For a small, mostly online store, TaxJar is generally simpler to set up. Avalara is stronger for complex products, exemption certificates and many jurisdictions. Many small single-channel stores can start with their platform's built-in tax plus a tracker.

Does Shopify handle state registration after reaching nexus?

Generally no. You register with each state yourself or through a service, then add the registration in Shopify so it starts collecting.

What's the cheapest way to file sales tax in multiple states?

Filing directly on each state's website, using clean sales-by-state numbers. It's free apart from your time.

Can I switch tools later?

Yes, but keep your own copy of sales-by-state history and filed returns outside any one vendor. If your records live only inside a subscription, switching or cancelling gets harder.

Do I still need a CPA if I use software?

Software handles the routine. A CPA is still worth it for nexus reviews, product taxability questions and any back-tax exposure.

Keep reading

• Flying Blind in Your Business? Why Your Numbers Show Up Months Late
• One Client Is 50% of Your Revenue? Here's What That Really Means
• Did the Work 60 Days Ago and Still Not Paid? Here's Why
• Profitable but No Money in the Bank? Here's Where the Cash Went

Sources

• Every state with a sales tax has an economic nexus law, following South Dakota v. Wayfair (June 21, 2018) — Avalara, 2026
• As of January 1, 2026, 16 states had eliminated the 200-transaction economic nexus threshold — Avalara, 2026
• 66.5% of IT leaders reported unexpected SaaS charges from consumption-based or AI pricing — Zylo SaaS Management Index, 2025
• 63% of early-stage owners say they waste at least one day a month on administrative financial tasks — Tide survey via Startups.co.uk, 2016
• Owners' top financial admin frustrations: tax calculations (54%), accounting (51%), tracking expenses (49%), juggling multiple apps (38%) — Tide survey via Startups.co.uk, 2016
• Roughly 60% of SMBs made a software purchase they regretted in the past 18 months — Capterra Tech Trends Survey, 2024

Written by Hunter J. Schneider, founder of Valuexus. Get your free 173-point AI audit.