The US eCommerce sector is booming, with annual sales expected to reach a whopping $1.53 trillion in 2026 — that’s a jump of nearly 7% compared with 2025, and there’s every indication that growth will continue throughout the end of the decade.
That makes it a fantastic time to begin selling online in the United States, both for homegrown entrepreneurs and overseas businesses.
The bad news? While new eCommerce sellers should benefit from gaining access to a large consumer base, they may also have to deal with the complexity of sales tax in the United States. Forty-five of the fifty states, plus D.C., have sales tax, and it’s important that businesses get it right. Failure to do so runs the risk of non-compliance and potential penalties.
The good news is that you don’t have to navigate US sales tax all on your own. There are managed sales tax services that can do so on your behalf. With that in mind, we thought it’d be a good idea to put together a ranked list of the best US sales tax services for eCommerce businesses.
- RJM Tax Exemption: Best Overall Tax Accounting Services
Want confidence that you’re working with the best of the best? Then RJM Tax Exemption could be just the sales tax accounting service you’ve been looking for.
According to TrustPilot, RJM Tax Exemption is the highest rated sales tax company in the world, and it’s not hard to see why. Not only do they handle every aspect of US taxation, but they do so at highly affordable rates. They can manage sales tax compliance and exemption to company registration, and much more, at a cost that won’t break the bank — that means new businesses looking to enter the US market get to keep as much of their capital as possible, while also benefiting from optimized tax strategies that improve their bottom line.
They work with eCommerce and online businesses from all over the world, so wherever your business is located, they’ll be able to help. We especially like that they offer a free in-depth sales tax liability assessment and consultations, which not only demonstrates how they can help you, but also makes it easy to get a sense of the company before signing up. If you do decide to work with them, you’ll benefit from a price match guarantee — you won’t find better rates anywhere else — and also get to enjoy your first month of sales tax filing for free, up to a value of $1000.
The bottom line? For simple, affordable, and stress-free sales tax services, it’s hard to look past RJM Tax Exemption.
- Ledger Gurus: A Good Option For Growing Businesses
Ledger Gurus aim to eliminate the stress that can come from managing sales tax when selling across multiple platforms in the United States. Whether you need to register in new states, you’re behind on filings, you’re dealing with sales tax notices arriving at your home, or you simply find that dealing with your sales tax obligations is taking up too much of your time, they can help.
They’re a good option for growing eCommerce businesses because they have wide-ranging expertise that can help to take control of a business’s sales tax obligations, freeing up time for staff members to focus on value-adding tasks. They offer a free sales tax risk assessment on their website, which can give insights into the level of risk/exposure a business is facing.
They offer two services: Managed Returns Services, which includes basic sales tax support, and Full-Service Sales Tax, which is a more comprehensive service designed for growing or complex eCommerce businesses.
- AVASK: Best for UK Sellers Entering the US Market
AVASK, a sales tax compliance company based in the UK, makes it straightforward for overseas businesses to enter the US market. While their services are available to clients around the world, they primarily focus on UK businesses looking to expand into the United States.
In addition to providing a host of services designed to streamline the sales tax obligations for your business, AVASK also provides additional services that make it easy for international businesses to get up and running in the US, including company formation and bookkeeping, and personal/business tax registration and filing.
- Zamp: A Reliable Sales Tax Service Provider
Zamp offers fully managed sales tax services that help eCommerce businesses to take their sales tax obligations off their plate and put them into the hands of experts. When you work with Zamp, your brand will benefit from accurate product taxability, precise tax calculations, automated registration and filings, and expert sales tax advice when required. They also offer their services for a fixed price, which means you’ll know exactly how much their services will cost you. They’re trusted by large brands thanks to their comprehensive tax services — once you bring them on board, you can essentially forget about sales tax entirely, allowing you to focus on growing your business secure in the knowledge that the all-important sales tax is being handled by experts.
- TaxConnex: An Experienced Sales Tax Service Partner
TaxConnex brings more than 20 years of experience in the sales tax sector to its offerings, helping even brands with the most complex tax situations to remain fully compliant. They’re well-versed in tracking nexus, the challenges of multi-channel selling, and how drop shipment tax works.
The system primarily uses software, but there’s human oversight when necessary. The end result? Straightforward sales tax management, including accurate calculations, filings, and GL reconciliation.
Final Thoughts
It’s easy to overlook sales tax compliance when you’re focused on growing your brand, but it’s important to take it seriously as early as possible. After all, if things are correct from the beginning, then there’s significantly less risk of running into issues further down the line. Plus, with so many great options on the table, including our number one choice RJM Tax Exemption, ensuring that your sales tax is in order couldn’t be more straightforward. Simply work with experts, and you can get back to focusing on growing your business.
