Invoicing Basics
What is an Invoice? The Complete Guide for Small Businesses
Learn what an invoice is, why it matters for your business, and how to create professional invoices that get you paid faster.
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IronBase Blog
Practical guides on invoicing, getting paid, and running your business.
Invoicing Basics
Invoice vs Receipt: What's the Difference?
Learn the key differences between invoices and receipts, when to use each, and why confusing them can cause problems for your business.
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Invoicing Basics
How to Write an Invoice: Complete Step-by-Step Guide
Learn how to write a professional invoice step by step. Includes what to include, common mistakes to avoid, and tips for getting paid faster.
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Invoicing Basics
Invoice Numbers: What They Are and How to Use Them
Learn what invoice numbers are, why they matter, and how to create a numbering system that keeps your business organized and professional.
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Getting Paid
Overdue Invoices: How to Get Paid Without Burning Bridges
Learn how to collect overdue and outstanding invoices with professional email templates, escalation strategies, and prevention tips that actually work.
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Time Tracking
Time Tracking for Freelancers: The Complete Guide
Learn how to track time as a freelancer, choose the right method, avoid common mistakes, and turn tracked hours into invoices efficiently.
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Time Tracking
What Are Billable Hours? A Complete Guide
Learn what billable hours are, how to calculate them, what counts as billable vs non-billable, and how to maximize your billable time as a freelancer or consultant.
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Templates
Free Freelance Invoice Template (Excel) + What to Include
Download a free freelance invoice template for Excel. Learn exactly what to include on your invoices to look professional and get paid faster.
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Templates
Free Contractor Invoice Template (Excel) + Complete Guide
Download a free contractor invoice template for Excel. Learn what to include on contractor invoices for labor, materials, and project billing.
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Templates
Free Consulting Invoice Template (Excel) + Professional Guide
Download a free consulting invoice template for Excel. Learn how to invoice for consulting services, retainers, and advisory work professionally.
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Templates
Free Construction Invoice Template (Excel) + Best Practices
Download a free construction invoice template for Excel. Learn how to bill for labor, materials, equipment, and progress payments on construction projects.
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