If you run a Perfex CRM agency and invoice clients across the EU and the United States, you already know the problem: tax rates change on a quarterly basis, invoices go out wrong, and clients push back. The Perfex VAT module from Vollstart solves this at the source — pulling verified, current rates directly into Perfex before your next invoice is ever created.
Tax compliance sounds like an accounting problem. In practice, it is a billing operations problem — and it lands squarely on whoever manages Perfex CRM for the agency.
The European Union alone spans 27 member states, each with its own standard VAT rate, reduced rates, and category-specific rules. France applies 20% to most services and 5.5% to certain goods. Germany runs at 19% standard and 7% reduced. Luxembourg, which draws a disproportionate share of digital service invoices, sits at 17%. These are not static figures. Rate adjustments happen, special measures get introduced, and temporary reductions occasionally become permanent — often with short notice.
The United States adds another layer. Fifty states, each with independent sales tax authority, many updating their rates on a quarterly schedule. A client in Colorado, another in Texas, a third in Washington — three different rates, three different update cycles, all sitting in your Perfex tax table waiting to go stale.
Each of these errors costs time to correct, damages client confidence, and creates compliance exposure. And they are entirely avoidable with the right tooling in place.
[SCREENSHOT: Perfex CRM invoice showing an incorrectly applied VAT rate — example of what happens before the module is installed]
Perfex CRM is excellent project management and billing software. It is not, however, a tax data service. Out of the box, Perfex stores the tax rates you manually enter — and keeps them exactly as entered until you manually change them. There is no built-in connection to official tax registries, no alert when a rate changes, and no scheduled synchronisation that keeps your rate tables accurate over time.
Most agencies work around this by assigning someone — usually a project manager or finance team member — to monitor tax authority websites and update Perfex by hand. That approach works until it fails. A Q1 adjustment in France or a mid-year revision in a US state goes unnoticed for two billing cycles, and suddenly you have a backlog of invoices to reissue and clients to explain yourself to.
The root cause is structural: your invoicing tool and your tax data live in separate worlds. Perfex holds the rate. The EU Commission and state tax registries hold the truth. Nothing connects them. Until you add a module that does exactly that.
The VAT Rates for Perfex CRM module from Vollstart bridges that gap directly. It connects your Perfex installation to authoritative tax data sources — the EU Commission for European VAT rates, and US state tax registries for American sales tax — and keeps your Perfex rate tables synchronised on a schedule you control.
The setup is straightforward. There is no API configuration, no external accounts to manage, and no coding required:
From that point on, the rates in your Perfex tax table reflect verified, current data. When you create the next invoice, the correct rate is already filled in. No spreadsheet open in a second tab. No copy-paste from a government PDF. No cross-checking with a colleague.
[SCREENSHOT: VAT Rates module dashboard inside Perfex CRM — EU and US source selection and sync schedule configuration]
The video embedded above walks through the full setup from installation to first sync. The entire process takes minutes, and the module runs silently in the background from that point forward.
The module is designed for agencies and independent consultants who use Perfex CRM and regularly invoice clients across the EU and the United States. If all of your clients are in a single stable jurisdiction, manual management is workable. But once you cross borders and billing cycles, automated sync becomes the only sustainable approach.
This module fits your workflow if any of the following applies:
It is also a strong fit for Perfex resellers and white-label agencies managing multiple instances. Keeping rate tables accurate across several Perfex installations — each with its own client mix — without a centralised sync mechanism is exactly the kind of overhead that scales badly and fails quietly.
[SCREENSHOT: Perfex CRM invoice with correct EU VAT rate applied automatically after module sync]
Tax rate errors are rarely dramatic. They do not usually trigger audits or immediate legal action. But they are a persistent, low-level source of operational friction: client queries, credit notes, reissued invoices, internal back-and-forth with finance. Over a year, that friction adds up to measurable time and real cost — cost that is invisible only because it appears in small increments.
The module removes that friction at the root. Your rates stay current because they synchronise from authoritative registries on a schedule you set. Your invoices go out correctly the first time. Clients stop sending rate queries. Your team stops maintaining a parallel spreadsheet.
27 EU countries. 50 US states. Rates that change every quarter. The Perfex VAT module handles all of it automatically, so you can focus on client work instead of tax table maintenance.
Get started with the free version, or go Pro for advanced sync options and priority support: