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BR-29:Invoice period end date before start date

The Invoicing Period End Date (BT-74) is before the Start Date (BT-73). The end date must be on or after the start date.

We can fix this automatically

AUTO-FIX

Auto-fix: Swap the start and end dates if they are reversed. This is a common data entry error where the dates are correct but in wrong fields.

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Why This Error Matters

Invoice rejected. An invalid billing period cannot be processed.

How to Fix It

1

Identify the dates

Find StartDate and EndDate in the InvoicePeriod element

2

Compare values

Check if EndDate is before StartDate

3

Swap if reversed

Exchange the date values so StartDate <= EndDate

Code Example

<cac:PartyTaxScheme>
  <cbc:CompanyID>NL123456789B01</cbc:CompanyID>
  <cac:TaxScheme>
    <cbc:ID>VAT</cbc:ID>
  </cac:TaxScheme>
</cac:PartyTaxScheme>

Technical Details

XPath: /Invoice/cac:InvoicePeriod/cbc:StartDate and /Invoice/cac:InvoicePeriod/cbc:EndDate. Dates use YYYY-MM-DD format (ISO 8601).

Common Causes

  • Invoice period dates entered in wrong order
  • End date before start date due to data entry error
  • Date picker UI allowed illogical date range
  • Copy-paste from previous invoice with wrong dates
  • System timezone issue causing date comparison failure

Commonly Seen In

All invoicing software

Frequently Asked Questions

The seller must have a VAT identifier or tax registration number.
Add seller VAT number in PartyTaxScheme. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, BR-29 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of BR-29 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including seller vat identifier or tax number required.
BR-29 is commonly seen in exports from All invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.

Related Errors

BR-07

Invoice must have buyer name

BR-CO-26

The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30),

Last updated: 16 January 2026

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