Forty-five US states charge sales tax, and every one has its own rules, thresholds, and filing deadlines. If you're looking for the best Shopify tax apps to handle compliance, the answer depends on how many states you file in, your order volume, and whether you need international coverage. But first — you probably owe sales tax in more places than you think.
Shopify gives you a built-in tax engine (Shopify Tax) that handles calculation and collection. But it doesn't file your returns or register you in new states. That's where third-party tax apps come in. The right one saves you hours every quarter. The wrong one costs you late fees, overpayments, or an audit you weren't prepared for.
This guide covers seven Shopify tax apps — what they actually cost, what they do well, and where they fall short. Every app listed here was verified on the Shopify App Store as of April 2026. If you're also auditing the rest of your app stack, our app cost audit guide can help you cut redundant subscriptions.
Start With Shopify Tax (It's Already Included)
Before installing anything, understand what you already have. Shopify Tax is built into every Shopify plan and handles the hardest part of sales tax: calculating the right rate at checkout.
It uses rooftop-level accuracy across 11,000+ US tax jurisdictions, which means it calculates tax based on your customer's exact address — not just their zip code. It also auto-suggests product categories so each item gets taxed at the correct rate. And it includes a liability insights dashboard that flags states where you may have hit economic nexus thresholds.
The pricing is straightforward. Shopify Tax is free until you hit $100,000 in US sales per calendar year. After that, you pay 0.35% per transaction (0.25% on Plus), capped at $0.99 per order.
What Shopify Tax doesn't do: file your returns, register you in new states, or remit the money you collected. For that, you need one of the apps below.
7 Best Shopify Tax Apps for 2026
1. TaxCloud — Best for Stores in SST Member States
Rating: 4.8/5 (95 reviews) · Pricing: Free to install; subscription based on order volume
TaxCloud stands out for one reason most competitors can't match: it participates in the Streamlined Sales Tax (SST) program. In the 24 SST member states, TaxCloud's filing service is subsidized by the states themselves, which means you can file in those states at significantly reduced cost — sometimes free.
The app syncs your Shopify orders daily, maps your products to tax categories automatically using Shopify's product types, and files returns across multiple states. Setup is fast, and the US-based support team is responsive.
The limitation: TaxCloud's SST advantage only applies in 24 states. If most of your nexus is outside those states, the cost savings shrink. And the pricing structure (based on order volume and return count) isn't published on the App Store listing, so you'll need to contact them for a quote.
2. Kintsugi — Best for AI-Powered Multi-Jurisdiction Compliance
Rating: 5.0/5 (26 reviews) · Pricing: Free plan available; Starter at $75/month
Kintsugi uses AI to classify products and addresses, track nexus across the US, EU, and Canada, and file returns automatically. It's one of the few Shopify tax apps that handles international tax compliance (EU VAT and Canadian GST/HST/QST) in addition to US sales tax.
The free plan gives you nexus monitoring and basic reporting. The $75/month Starter plan adds automated filing, state registrations, and a virtual mailbox for tax correspondence — a nice touch if you're registered in a dozen states and don't want mail from all of them.
The tradeoff: 26 reviews is a small sample. The app launched in August 2023, so it's newer than most competitors. If you want a battle-tested option with thousands of reviews, this isn't it yet. But the feature set punches above its weight for the price.
3. Tax Rex — Best Budget Option for Small Stores
Rating: 5.0/5 (107 reviews) · Pricing: From $5/month; AutoFile at $20/state/filing; Registration at $99/state
Tax Rex is the most affordable option on this list. At $5/month for the base plan, it's accessible for stores doing under $10K/month in revenue that still need to stay compliant. The app generates accurate sales tax reports, tracks economic nexus thresholds, and files returns on state portals for $20 per filing.
State registration is $99 per state — about 35% cheaper than most competitors charging $150. Reviews consistently praise the customer support, with merchants noting that the team provides detailed, personalized guidance rather than canned responses.
The limitation: Tax Rex is US-only. If you sell to the EU or Canada and need VAT/GST compliance, you'll need a separate solution.
4. BreezyFile — Best for Hands-Off Filing With Human Review
Rating: 5.0/5 (26 reviews) · Pricing: Free to install; $75/filing; $150/registration
BreezyFile takes a different approach. Instead of giving you a dashboard full of tax data and expecting you to manage it, BreezyFile's team of tax professionals prepares and files your returns for you. You install the app, it syncs with Shopify Tax, and experienced humans handle the rest.
It carries the "Built for Shopify" badge, which means it meets Shopify's highest standards for performance and integration. The app launched in August 2024 and has maintained a perfect 5.0 rating across 26 reviews.
The cost structure is simple: $75 per filing, $150 per state registration. No monthly subscription. If you file in 5 states quarterly, that's $1,500/year in filing fees alone — reasonable for a mid-size store, but it adds up for merchants with nexus in 15+ states.
5. Sidr — Best for Transaction-Based Pricing
Rating: 5.0/5 (66 reviews) · Pricing: Per-transaction pricing from $0.02–$0.05; AutoFile at $35–$45/filing
Sidr uses a pay-per-transaction model instead of a flat monthly fee. For stores with unpredictable order volume — seasonal businesses, flash sale stores, or merchants just starting out — this means you only pay for what you use.
The app includes an economic nexus dashboard, automated filing, and state registration ($150/state). As your volume grows, the per-transaction rate drops: $0.05 at the entry tier, $0.03 at the mid tier, and $0.02 at the highest tier. AutoFile costs also decrease with volume ($45, $40, and $35 per filing respectively).
Sidr's 66 reviews at a perfect 5.0 rating suggest strong merchant satisfaction, particularly around the support experience. Like Tax Rex, it's US-focused only.
6. TaxJar — Most Established (But Read the Reviews)
Rating: 2.6/5 (73 reviews) · Pricing: Starter at $39/month; Professional at $99/month (200 orders included; 30-day trial)
TaxJar is the name most merchants recognize. It's been in the Shopify ecosystem for years, and its feature set is comprehensive: economic nexus tracking, multi-state AutoFile, exemption certificates, and a sales tax API for custom integrations.
But the reviews tell a different story. At 2.6/5 stars, TaxJar has the lowest rating on this list. About 33% of reviews are 1-star, with recurring complaints about currency compatibility issues, slow customer service, and product categorization mismatches between Shopify and TaxJar's system. Several merchants report that TaxJar filed incorrect amounts because it miscategorized their products.
The pricing is also on the higher end. Both plans include only 200 orders per month, with overage fees after that. For a store processing 1,000+ orders monthly, the total cost can climb quickly.
TaxJar may still work for stores with straightforward tax needs and the patience to double-check filings. But given the alternatives on this list, it's hard to recommend as a first choice in 2026.
7. Numeral — Best for Full-Service Tax Management
Rating: 3.8/5 (22 reviews) · Pricing: Free to install; $75/filing; $150/registration
Numeral positions itself as the "spend less than five minutes a month on sales tax" solution. It handles calculation, collection, filing, and remittance — the full lifecycle. State registrations are $150 each, and filings are $75 per state per period.
The platform is clean and the onboarding is fast. Numeral's blog is one of the better resources for understanding sales tax compliance, which suggests the team knows the space deeply.
The 3.8/5 rating across 22 reviews is middling, though. Some merchants report issues with data sync accuracy. If you're considering Numeral, start with a small number of states and verify the first few filings manually before going fully hands-off.
Which Shopify Tax App Should You Choose?
Pick your app based on three factors: state count, order volume, and geographic scope.
- How many states you file in. Filing in 3 states? Almost any app works. Filing in 20+? Per-filing costs matter — compare TaxCloud's SST subsidies against flat-rate options like Tax Rex.
- Your monthly order volume. Under 500 orders? Tax Rex at $5/month is hard to beat. Over 2,000? Sidr's per-transaction pricing or TaxCloud's volume-based model may save more.
- US-only or international. If you need EU VAT or Canadian GST compliance alongside US sales tax, Kintsugi is currently the only app on this list that handles all three in one place.
What About Avalara?
Avalara is a major player in sales tax automation, but it doesn't have a Shopify app. You can integrate it through custom API connections, which makes it better suited for enterprise merchants on Shopify Plus with development resources. For most standard Shopify stores, the apps above are more practical.
Set Up Shopify Tax Before You Install Anything
Every Shopify tax app on this list handles filing and registration. Shopify Tax already handles calculation and collection for free up to $100K in annual US sales. Before adding a filing app, make sure Shopify Tax is configured correctly: product categories assigned, nexus states enabled, and liability insights reviewed.
Once that's set, pick a filing app that fits your budget and state count. Start with free trials where available, verify your first filing manually, and then let the automation run. If you're still setting up your store, our Shopify store launch checklist covers tax configuration alongside everything else you need before going live.