Our verdict

This Quaderno review covers a specialist tool rather than a full accounting package. Quaderno automates the indirect tax side of selling online: it calculates sales tax, VAT and GST at checkout, issues compliant invoices and receipts, watches the registration thresholds in each market you sell into, and produces the reports, or files the returns, that follow. For SaaS companies, digital product sellers, course creators and online shops that sell across borders, it removes a large amount of manual work. It does not replace your bookkeeping software, and its transaction-based plans get more expensive as volume grows.

NerdBible has not tested Quaderno hands-on for this review. This is an editorial assessment based on Quaderno's own pricing, product, integration and legal pages and on independent reviews and verified user ratings. Nothing here is tax advice; for decisions about where and when your business must register or file, speak to a qualified tax adviser.

What is Quaderno and who is it for?

Quaderno is a cloud tax compliance platform. It connects to the places where you take payments, such as Stripe, PayPal, Shopify or WooCommerce, records each transaction, works out which tax applies based on the customer's location and the type of product, and sends the customer an invoice or receipt. Over time it builds the data you need for tax returns.

Quaderno's own pages are written for SaaS businesses, e-commerce stores, digital creators, platforms and marketplaces, and accountants who serve them. The common thread is selling to customers in many countries or US states, where the rules for digital products and cross-border sales are hard to track by hand. A business that sells only in its home country, through one channel, may not need it at all.

Key features

Quaderno organises its product into four parts.

  • Monitor. Quaderno totals your sales by state and country across every connected channel and checks them against registration thresholds, including US economic nexus rules and VAT and GST limits. Quaderno says its rules cover more than 150 countries, and it sends email alerts when you reach 90 percent of a threshold and again at 100 percent.
  • Tax Engine. A real-time API that returns the tax rate for a sale, covering US state and local sales tax, EU and UK VAT, Canadian GST and HST and Australian GST. It can validate EU VAT numbers through the VIES system and UK VAT numbers, and apply the reverse charge automatically to valid business customers. It assigns tax codes by product type, so SaaS, digital downloads, physical goods and services are treated differently. Quaderno says the API responds in under 50 milliseconds and falls back on cached rate tables if a tax authority's systems are down.
  • E-invoicing. Tax-compliant invoices and receipts in PDF or HTML, sent the moment a sale happens, with automatic credit notes for refunds and chargebacks. Invoices can be sent in more than ten languages and in customers' local currencies. For countries that mandate structured e-invoices, Quaderno generates Peppol, UBL, Factur-X and local XML formats and routes them through a certified Peppol access point partner.
  • Filing. Quaderno turns sales data into jurisdiction-specific reports for US sales tax, the EU One Stop Shop VAT return, and VAT and GST returns in more than forty countries. You can download the reports for your accountant, or pay Quaderno to file returns and handle registrations on your behalf.

Integrations include Stripe, PayPal, Braintree and GoCardless for payments; WooCommerce, Shopify, Amazon FBA, Square and Easy Digital Downloads for e-commerce; Kajabi, Thinkific, LearnWorlds, SendOwl and others for courses and memberships; and Zapier for everything else. A REST API with official libraries for Node.js, Python, Ruby, PHP and Go covers custom billing systems, and a sandbox lets developers test before going live.

How much does Quaderno cost?

Our page shows current prices from our own data. Quaderno uses flat monthly plans defined by the number of transactions per month, where a transaction is any sale, refund or purchase recorded in the app.

  • Hobby: a small monthly transaction allowance, one user, one jurisdiction and one integration.
  • Startup, Business and Growth: progressively larger transaction allowances, each with unlimited users, unlimited jurisdictions and unlimited integrations.
  • Enterprise: a tailored plan for higher volumes.

Each plan includes API calls at ten times its transaction allowance. Yearly billing costs less than monthly. If you exceed your plan's limit, Quaderno says it alerts you as you approach it and then moves you up to the next tier rather than charging overage fees. Filing and registration services are quoted separately. Quaderno offers a 7-day free trial with no credit card required, and personalised onboarding calls for new users.

Is Quaderno safe and reliable?

Quaderno publishes a security policy, a data processing agreement, a subprocessor list and a service level agreement on its legal page, and runs a public status page. Its Tax Engine page cites a 99.99 percent uptime SLA and redundant servers. Because Quaderno connects to your payment processors and holds customer names, addresses and tax IDs, review the data processing agreement and subprocessor list as part of your own data protection checks.

What is Quaderno's support like?

Quaderno advertises support from people who know both taxes and the product, and every new user is offered a personal call to help with set-up. Verified users agree: on Trustpilot, Quaderno scores about 4.6 out of 5, and users describe support responses as fast and relevant. Capterra reviewers also rate customer service highly, while asking for better API documentation in some languages.

How easy is Quaderno to set up?

Quaderno is designed so that most sellers never write code. Its pages describe connecting a payment processor, shopping cart or billing platform in a few clicks, after which Quaderno pulls in transactions automatically and starts totalling sales by state and country. Invoices and receipts are then issued for each new sale without any manual step, and credit notes follow refunds automatically. New users are offered a personal call to answer questions and customise the set-up, and Quaderno says the platform has monitored many billions of dollars in transactions across its customer base.

Developers building a custom billing flow follow a different path: generate test keys, call the Tax Engine API from a sandbox, and move to production once the results look right. Quaderno publishes its API documentation openly, together with an OpenAPI specification. Some Capterra reviewers asked for better documentation for particular languages, so teams with unusual stacks should look at the docs during the trial rather than after it.

What could be better

  • It is not accounting software. Quaderno does not do bookkeeping, bank reconciliation or financial statements. You still need an accounting app such as Zoho Books or FreshBooks.
  • Costs rise with volume. Transaction-based tiers suit small and mid-sized digital sellers; high-volume businesses may find the cost climbs quickly, and an automatic upgrade replaces overage fees.
  • Filing service costs extra. Reports are included, but having Quaderno file returns and handle registrations is quoted separately.
  • A short trial. Seven days is little time to connect a payment processor and see a full month of data.
  • Not aimed at big physical-goods retailers. MakerStack notes it is not designed for large retailers of physical products, which may need a heavier tax platform.

Who should choose something else?

If you sell only in your home market through a single channel, your accounting software or your payment processor's built-in tax tools may be enough. If you need full accounting, Quaderno is an add-on, not a substitute. If you are a large retailer of physical goods with thousands of product types and complex exemptions, compare enterprise tax platforms. And if your main need is someone to take legal responsibility for your sales as a merchant of record, look at that model instead, because Quaderno calculates and reports tax while you remain the seller.

Is Quaderno worth it?

For SaaS companies and online sellers who sell into many countries or US states, Quaderno is a strong, focused choice. It brings threshold monitoring, tax calculation, compliant invoicing and return preparation into one service that plugs into the payment tools these businesses already use, with plans that are published openly rather than hidden behind a sales call. That is why we list it as our pick for tax automation on our accounting software page. Treat it as a companion to your accounting software, check that your transaction volume fits a plan comfortably, and confirm your own registration obligations with a tax professional.

What other reviewers found

Quaderno is a specialist product, so the independent picture comes from software reviewers that focus on SaaS tools and from verified user platforms rather than general technology magazines.

  • MakerStack scored it 8.1 out of 10, praising transparent flat pricing and real-time threshold tracking, while warning that transaction-based pricing escalates with volume and that native filing does not cover every country.
  • SaaS Expert rated it 4.4 out of 5 for SaaS and digital product sellers, but said filing was not fully automated and that it lacks general accounting features.
  • On Capterra, verified users rate it about 4.6 out of 5, liking one-click tax reports and responsive support, while asking for better API documentation and more invoice customisation.
  • On Trustpilot, users give it about 4.6 out of 5, often citing years of reliable use; the few complaints concern billing communication.

The reviewers agree that Quaderno does its core job well: accurate tax calculation, compliant invoices and threshold alerts, with support that users like. They agree too that it is not accounting software and that costs rise with transactions. The main disagreement is about filing. One review says filing is not fully automated, while Quaderno's own filing page now describes a service that submits returns and handles registrations on your behalf, priced separately. Reviews of fast-changing software age quickly, so for a buyer the practical step is to ask Quaderno for a filing quote for your specific countries and states before assuming either view.

Frequently asked questions

Is Quaderno accounting software?

Not in the usual sense. Quaderno handles indirect tax: calculating sales tax, VAT and GST, issuing compliant invoices and receipts, tracking registration thresholds and preparing or filing returns. It does not do bookkeeping, bank reconciliation or financial statements, so most businesses use it alongside accounting software such as Zoho Books, FreshBooks or similar tools.

Which platforms does Quaderno integrate with?

Quaderno lists native integrations with Stripe, PayPal, Braintree, GoCardless, WooCommerce, Shopify, Amazon FBA, Square, Easy Digital Downloads, Kajabi, Thinkific, LearnWorlds and SendOwl, among others, plus Zapier. Its REST API, with official libraries for several programming languages, covers custom billing systems. Hobby plans are limited to one integration; higher plans allow unlimited integrations.

Can Quaderno file my tax returns?

Quaderno says it can prepare reports for US sales tax, the EU One Stop Shop return and VAT and GST returns in more than forty countries, and that it can file returns and handle registrations on your behalf as a separately quoted service. Whether and where you must file depends on your circumstances, so confirm your obligations with a qualified tax adviser.

How does Quaderno pricing work?

Quaderno charges a flat monthly fee based on the number of transactions per month, counting sales, refunds and purchases. Higher tiers include more transactions, unlimited users and unlimited integrations, and yearly billing costs less. If you exceed your allowance, Quaderno moves you to the next plan instead of charging overage fees. Filing services are priced separately.

Does Quaderno have a free trial?

Yes. Quaderno's pricing page offers a 7-day free trial with no credit card required. Because a week is short, connect your main payment processor on the first day and review a few real invoices and the threshold dashboard. New users are also offered a personal onboarding call to help with set-up.

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