Vertex is reliable overall but not incident-free: StatusBird's independent monitoring recorded 99.95% availability with 1 major incident totaling 1 hour of downtime in the last 90 days.
Numbers alone do not tell you whether to worry, so this post also covers what actually breaks when Vertex has problems and how to get warned early.
What is Vertex?
Vertex Inc is an enterprise tax technology company whose software calculates sales tax, VAT, and other transaction taxes in real time. E-commerce operations integrate Vertex with their commerce platform, ERP, or order management system so every checkout and invoice gets an accurate, jurisdiction-specific tax amount, and use it for returns filing and compliance reporting.
Vertex uptime and outage history
| Metric (90 days, as of July 2026) | Value |
|---|---|
| Availability | 99.95% |
| Reliability grade | A+ |
| Major incidents | 1 |
| Total major-outage downtime | 1 hour |
| Average incident duration | 1 hour |
| Most recent major incident | April 24, 2026 |
| Checks in window | 61,537 |
Among the 3 tax compliance services StatusBird monitors, Vertex ranks number 2 for 90-day availability. See the full ranking of tax compliance tools by reliability.
What happens to your store when Vertex goes down?
When the Vertex tax calculation service is unavailable, your checkout cannot get a live tax amount for the order. Depending on how your integration handles failure, checkout either blocks entirely, hangs at the payment step, or falls back to an estimated or zero tax amount that may be wrong. Wrong tax collected creates compliance cleanup work later, and blocked checkouts stop revenue outright. Back-office invoicing and ERP transactions that call Vertex can also fail or queue.
Typical symptoms during a Vertex outage:
- Checkout hangs or errors at the step where tax is calculated
- Orders completing with zero or obviously wrong tax amounts
- Tax calculation timeout errors in your platform or ERP logs
- Vertex cloud dashboard or APIs unreachable
- Invoices failing to post in your ERP because tax calls do not return
If you are in the middle of an incident right now, see what to do when Vertex goes down for a step-by-step playbook.
Frequently asked questions
Can I legally keep selling if Vertex is down and tax is estimated?
Merchants remain responsible for remitting the correct tax regardless of how it was calculated at checkout. Many businesses keep selling with cached or estimated rates and true-up afterward, absorbing small differences. Flag affected orders and review them with your tax team once service is restored.
Why did my checkout stop working when only my tax provider went down?
Most integrations call Vertex synchronously during checkout to compute the order total, so a timeout there can stall the whole flow. Ask your developers or platform vendor to configure a timeout with a fallback rate so a tax service outage degrades gracefully instead of blocking sales.
How this data is measured
StatusBird checks Vertex's status every 2 minutes, around the clock, independently of the vendor. The availability figure counts major and critical outages only; minor degradation is excluded so numbers are not skewed by vendors that report small blips near-continuously. Grades run from A+ to F. See the live numbers on the Vertex reliability page and current status on the Vertex status page, or browse all 84 service grades.
Know before your customers do
StatusBird monitors Vertex and 83 other services online stores depend on, plus your own storefront, every 2 minutes. When something goes down you get an SMS, email, or Slack alert with plain-English context, usually before the official status page catches up. Start monitoring free, no card required for the free plan.