How Tax Works Between Releventful and Xero / QuickBooks

Releventful includes a built-in tax engine designed specifically for event-based businesses. All pricing, GST/VAT calculations, inclusive or exclusive logic, and invoice totals are calculated within Releventful first.

When invoices sync to Xero or QuickBooks, the accounting platform records the final, approved totals exactly as issued to your client.

This approach ensures:

All tax calculations originate in Releventful, including:

By calculating tax once — and only once — Releventful ensures complete consistency across all client-facing documents.

Releventful calculates tax before the invoice is sent to your accounting platform.

For tax-exclusive pricing:

This helps keep the invoice total consistent between Releventful and your accounting platform.

When an invoice is sent to QuickBooks, the tax amount calculated by Releventful is sent as its own invoice line.

You can control which QuickBooks Product/Service is used for several types of synced invoice lines under:

Settings → Business Brands→ Select your brand→ Scroll down to the QuickBooks section

Available mappings include:

Packages and Add-Ons can also have their own individual QuickBooks Product/Service mappings.

Because Releventful has already calculated the tax amount, your QuickBooks Product/Service configuration should be set up so that QuickBooks does not unintentionally calculate additional tax on the same invoice lines.

The important distinction is:

Releventful determines the tax amount. Your QuickBooks Product/Service configuration determines how QuickBooks categorizes and subsequently treats the synced line.

Releventful also calculates the tax amount before sending the invoice to Xero.

The invoice values sent to Xero are based on the finalized amounts calculated in Releventful rather than asking Xero to independently recalculate the invoice tax.

Your Xero account and tax configuration should therefore be set up so that Xero records the synced invoice amounts without introducing an additional tax calculation that would change the finalized totals.

For Xero-specific setup and account mapping, see the Xero Integration Setup article.

For exclusive pricing:

For inclusive pricing:

To maintain consistency between Releventful and your accounting platform:

This ensures that what your client sees, what Releventful records, and what your accounting system reflects all remain perfectly aligned.

Because Releventful has already calculated the tax before the invoice is synced, your accounting platform should not apply an additional tax calculation that changes the finalized invoice amounts.

If additional tax is calculated in Xero or QuickBooks after syncing, the accounting total may no longer match:

For QuickBooks users, review the taxability and accounting configuration of the Product/Service items mapped to your Releventful invoice lines.

For Xero users, review the applicable Xero account and tax configuration used for synced invoice data.

This keeps Releventful as the source of truth for the tax calculation while allowing each accounting platform to record the invoice according to your accounting setup.

Event pricing often includes:

By centralizing tax calculation inside Releventful, your operational documents (proposals, contracts, BEOs) always stay aligned with your invoices — without relying on multiple systems to interpret tax rules differently.

If you have questions about how this applies to your specific GST or VAT setup, our team is happy to walk through it with you.