PDF Invoices & Packing Slips for WooCommerce
Free WooCommerce invoice and packing slip plugin by WP Overnight with email attachments, e-invoice formats and paid add-ons for credit notes and…
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Flexible Invoices for WooCommerce
WP Desk's VAT-focused invoicing plugin for WooCommerce and WordPress, with a block-based template editor, EU VAT tools and PRO proformas and corrections.
Free installs6K+WordPress.org, active
Est. Pro installs~780Likely 390–1.6K
Rating4.4/537 reviews
Price from$59/yrFreemium
Last updated21 Oct 2026Version 7.1.0
Overview
Flexible Invoices (listed on WordPress.org as Flexible PDF Invoices for WooCommerce & WordPress) comes from WP Desk, the Polish developer behind Flexible Shipping and Flexible Checkout Fields. Unlike most plugins in this category it works without WooCommerce too: invoices are stored as their own post type, so you can issue manual invoices for services alongside invoices for WooCommerce orders.
The free version creates PDF VAT invoices for orders and manual invoices, with a Gutenberg-based template editor and predefined templates. It manages currencies, tax rates and payment methods, supports VAT-exempt sellers, adds an EU VAT number field to checkout (including the block checkout in version 7.0), and offers custom numbering with prefixes, suffixes, start numbers and resets. Invoices can be downloaded in bulk as a ZIP for a date range, translated with WPML, and summarised in a simple report. HPOS compatibility was added in version 5.6.10, and recent releases added support for Poland’s KSeF e-invoicing system.
PRO and add-ons
Flexible Invoices PRO ($59 per year for one site) issues and sends invoices automatically, adds proforma and correction invoices, validates EU VAT numbers against VIES, supports OSS reporting and converts VAT amounts into local currency. Paid add-ons cover advanced templates, filters, reports, conditional logic, scheduled sending to an accounting office and PEPPOL e-invoicing with UBL output. The All Plugins Bundle ($99 per year, 25 sites) includes PRO and every add-on.
Limitations
- No packing slips or shipping labels, so fulfilment documents need another plugin.
- Automatic sending emails a download link rather than attaching the PDF by default.
- No cloud storage upload.
- Smaller user base (6,000+ installs) and a 4.4-star rating.
It suits EU, and especially Polish, businesses that need proper VAT invoices, corrections and OSS handling, or that invoice outside WooCommerce as well.
Best for: EU businesses, especially in Poland, that need compliant VAT invoices, corrections and OSS, including invoices outside WooCommerce.
Flexible Invoices is a solid choice when VAT compliance matters more than fulfilment paperwork. The free version is useful for manual and order invoices, but most stores will want PRO for automation, proformas and corrections, and will need a separate plugin for packing slips.
Pros
- Works for WooCommerce orders and standalone WordPress invoices
- Strong EU VAT handling: VAT number field, VIES, OSS, reverse charge
- Block-based template editor in the free version
- KSeF support and a PEPPOL/UBL add-on
- Bundle of PRO plus all add-ons is inexpensive at $99/year
Cons
- No packing slips, delivery notes or labels
- Proformas, corrections and automatic sending need PRO
- No cloud storage upload
- Smaller user base than the leading plugins
Key features
What Flexible Invoices for WooCommerce highlights on its WordPress.org page and its own website, split by version.
Free version WordPress.org
- PDF invoices for WooCommerce orders
- Manual invoices without WooCommerce
- Gutenberg-based template editor
- Predefined invoice templates
- Custom numbering with prefixes and resets
- EU VAT number field at checkout
- VAT-exempt seller support
- Bulk ZIP download by date range
- Currencies, tax rates and payment methods
- WPML translation support
- Summary reports by date range
Pro / paid adds From $59/yr
- Automatic invoice issuing and sending
- Proforma invoices
- Correction invoices
- VIES VAT number validation
- OSS and MOSS support
- VAT conversion to local currency
- Advanced Templates add-on
- Advanced Sending to accountant
- Advanced Reports and Filters
- PEPPOL e-invoicing add-on
Feature checklist
12 of 17 features we track in WooCommerce PDF Invoices, feature score 69/100
Documents 3/5
PDF invoices Key
Generates PDF invoices for orders.
Free PDF VAT invoices for WooCommerce orders and manual invoices.
Included
Packing slips Key
Generates packing slips for fulfilment.
No packing slip document is offered.
Not included
Credit notes & refunds
Credit notes for refunded orders.
Correction invoices (credit notes) are a PRO feature.
Paid version PRO
Proforma invoices
Proforma or quote documents.
Proforma invoices for WooCommerce orders are PRO-only.
Paid version PRO
Shipping labels & delivery notes
Address labels, delivery notes or dispatch documents.
No shipping labels or delivery notes.
Not included
Invoice content 4/5
Templates & customisation Key
Choose and customise invoice layouts.
Free Gutenberg-based template editor with predefined templates; Advanced Templates add-on adds more.
Included
Sequential numbering Key
Custom invoice number formats and sequential numbers.
Free custom numbering with shortcodes, prefixes, suffixes, start number and resets.
Included
VAT & tax details Key
VAT numbers, tax breakdowns and legal fields.
Free EU VAT number field and VAT-exempt support; PRO adds VIES validation and OSS.
Included
Multilingual invoices
Invoices in the customer's language.
Free version translates invoices into customers' languages with WPML.
Included
Custom fields & notes
Add order meta, custom fields or notes to documents.
Could not confirm support for custom order meta on invoices.
Not verified
Delivery & automation 3/5
Attach to emails Key
Automatically attach invoices to order emails.
PRO sends invoices automatically as an email with a download link; manual sends can attach the PDF.
Partial PRO
Download from My Account
Customers download invoices from their account.
Docs only describe admin downloads; customer My Account access not confirmed.
Not verified
Bulk download & print
Bulk generate, print or zip documents.
Free bulk download of invoices for a date range as a ZIP file.
Included
Cloud storage upload
Upload invoices to Dropbox, Google Drive or similar.
No Dropbox, Google Drive or other cloud upload mentioned.
Not included
Accounting integrations
Send invoices to QuickBooks, Xero or similar.
No QuickBooks/Xero link; Advanced Sending add-on emails invoices and CSV reports to an accountant.
Partial Advanced Sending add-on
Compatibility 2/2
HPOS compatible
Declared compatible with WooCommerce High-Performance Order Storage.
HPOS support added in version 5.6.10.
Included
E-invoicing standards
Supports UBL, Peppol, XRechnung or other e-invoice formats.
KSeF support in recent versions; PEPPOL add-on for PRO generates UBL XML.
Via add-on
Pricing
Free
$0On WordPress.org
Basic (Free)
Freeper yearUnlimited
Manual and WooCommerce invoices, block template editor, VAT number field, numbering, ZIP download.
Flexible Invoices PRO
$59per year1 site
Automatic invoicing, proformas, corrections, VIES validation and OSS. 30-day money-back.
All Plugins Bundle
$99per year25 sites
PRO plus all add-ons (Advanced Templates, Filters, Reports, Sending, Conditional Logic, PEPPOL) and priority support.
Prices are list prices from the vendor's site, checked 14 Oct 2026. Many vendors discount the first year.
How many sites use Flexible Invoices for WooCommerce?
Free installs from WordPress.org, the vendor's own claim, and our estimate of paid installs.
Free version (WordPress.org)
6K+
Active installations reported by WordPress.org.
Vendor claim
6,000+
Paying customers claimed by the vendor. source
Estimated Pro / paid installs
~780
Our estimate, see method below.
How we estimated this: About 6.5K free installs x 12% (the usual share of free sites that also run the paid version when some key features are paid, and store owners upgrade more often) gives 780. Likely range: 390 to 1.6K. This counts sites running the paid version, including sites whose licence has lapsed. Estimates are rough and based on public figures as of 14 Oct 2026.
Stats & health
Weekly downloads
1,272 downloads last week, 434K all time
Rating breakdown
| Version | 7.1.0 |
|---|---|
| Last updated | 21 Oct 2026 (13 days ago) |
| Tested up to | WordPress 7.1.4 |
| Requires | WordPress 6.4+, PHP 7.4+ |
| Support threads (2 months) | 1 of 1 resolved |
| On WordPress.org since | 23 Aug 2016 |
Company & policy
| Paying customers claimed | 6,000+ (source, 14 Oct 2026) Product page says 'Join 6,000+ happy customers'; this roughly matches free installs, so it likely counts all users. |
|---|---|
| Refund policy | 30-day money-back (source, 14 Oct 2026) |
Flexible Invoices for WooCommerce compared
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FAQ
Is Flexible Invoices for WooCommerce free?
Yes. Flexible Invoices for WooCommerce has a free version on WordPress.org. Paid plans start at $59/yr.
How many sites use Flexible Invoices for WooCommerce?
WordPress.org reports 6K+ active installations of the free version. We estimate around 780 sites run the paid version.
Does Flexible Invoices for WooCommerce have pdf invoices?
Yes: included. Free PDF VAT invoices for WooCommerce orders and manual invoices.
Does Flexible Invoices for WooCommerce have packing slips?
No: not included. No packing slip document is offered.
Does Flexible Invoices for WooCommerce have templates & customisation?
Yes: included. Free Gutenberg-based template editor with predefined templates; Advanced Templates add-on adds more.
Does Flexible Invoices for WooCommerce have sequential numbering?
Yes: included. Free custom numbering with shortcodes, prefixes, suffixes, start number and resets.
Does Flexible Invoices for WooCommerce have vat & tax details?
Yes: included. Free EU VAT number field and VAT-exempt support; PRO adds VIES validation and OSS.
Does Flexible Invoices for WooCommerce have attach to emails?
Yes: partial (PRO). PRO sends invoices automatically as an email with a download link; manual sends can attach the PDF.
Can Flexible Invoices be used without WooCommerce?
Yes. It can issue manual invoices in plain WordPress as well as invoices for WooCommerce orders.
What does PRO add?
Automatic issuing and sending, proforma and correction invoices, VIES validation, OSS support and local-currency VAT conversion. PRO is $59 per year for one site.
Does it create packing slips?
No. Flexible Invoices focuses on invoices; packing slips or labels need another plugin.
Does it support e-invoicing?
Recent versions added KSeF support for Poland, and a PEPPOL add-on for PRO generates UBL XML files.
Last updated 14 Oct 2026. Spotted something wrong? Suggest an edit.