BlueInvoice Blog Overview

Browse all articles and tutorials in one overview.

Illustrated invoice showing detailed line items including consulting, graphic design, and web development services, with a magnifying glass highlighting a billing entry
May 06, 2026 · 8 min

How to Write Clear Invoice Line Items

Invoice line items are the individual rows on an invoice that break down exactly what a client is being charged for, l… Read more

Invoice record keeping workflow from physical document storage to cloud archiving with 7-year financial retention requirements
Apr 29, 2026 · 9 min

How Long Should You Keep Invoices?

Knowing how long to keep financial records is one of those things most freelancers and small business owners put off u… Read more

Sample proforma invoice template showing billing details, shipping details, item description table with quantity and unit price columns, terms and conditions, and total amount due in euros
Apr 20, 2026 · 8 min

Proforma Invoice Format: What to Include and When to Use One

A proforma invoice format is a preliminary document sent to a buyer before a sale is finalized, outlining what goods o… Read more

Apr 10, 2026 · 8 min

Invoice Automation: Save 5 Hours Per Week in 2026

If you're spending hours each week chasing down invoice approvals, manually entering payment details, or re-sending th… Read more

Mar 30, 2026 · 9 min

EU E-Invoicing Mandates 2026: Which Countries Require It and When

If you sell goods or services across EU borders, understanding EU e-invoicing requirements by country is no longer opt… Read more

Mar 23, 2026 · 8 min

Free Invoice Generator vs. Paid Software: What Do You Actually Need?

The debate around free invoice generator vs paid software is one that trips up a lot of freelancers and small business… Read more

Mar 18, 2026 · 8 min

How to Invoice Clients From Your Phone in 2026 (No App Download Needed)

The ability to use a mobile invoicing app - or skip the app entirely - has changed how freelancers and small business … Read more

Mar 13, 2026 · 8 min

Freelancer's Guide to Professional Invoicing 2026

Learning how to invoice as a freelancer is one of those skills that directly affects how fast you get paid and how pro… Read more

Mar 05, 2026 · 7 min

Free Invoice Templates That Convert: Design Tips for 2026

Every year, countless freelancers and small business owners watch potential repeat clients slip away, not because of p… Read more