Professional invoice template
Classic Invoice Template
Traditional professional layout with a clean grid structure and blue accents
Free to customize. Add your logo and invoice details, then export a print-ready PDF.
- Best for
- consultants and advisors and corporate service teams
- Format
- Editable A4 invoice
- Price
- Free template
- Export
- Print-ready PDF
Professional services billing
About this classic invoice template
A timeless professional invoice template with a disciplined blue grid, familiar business hierarchy, and clear itemized billing for consultants, corporate teams, and established service firms.
Designed for consultants and advisors, corporate service teams, and accounting and administrative firms, this layout makes consulting retainers, administrative services, corporate project fees, and professional reimbursements easier to scan while keeping business details, dates, payment terms, and the final balance in a dependable A4 structure.
Built for real invoices
What this template includes
- Familiar blue-and-white business layout
- Conservative typography for formal client billing
- Clear table and totals hierarchy
- Editable business identity, contact details, and logo
- Client billing details and optional shipping address
- Itemized quantities, rates, taxes, discounts, and totals
- Invoice number, issue date, due date, payment terms, and notes
Four simple steps
How to use the Classic template
Open the template
Choose “Use this template” to load Classic in the free CatInvoice editor.
Add business and client details
Replace the sample identity, contact, invoice number, dates, and billing address.
Itemize the work
Add clear rows for consulting retainers, administrative services, corporate project fees, and professional reimbursements, then apply any tax, discount, shipping, or payment credits.
Review and export
Check the totals and payment terms, preview the final A4 layout, and export a print-ready PDF.
Invoice with confidence
Professional services invoicing tips
- Use a consistent invoice-number sequence for easier reconciliation.
- State the payment deadline beside the issue date.
- Keep service descriptions specific enough for client approval.
Authoritative references
Helpful invoicing resources
Invoice requirements vary by business and location. These independent government resources provide useful recordkeeping and invoice-field guidance.
Common questions
Classic template FAQ
Is the Classic invoice template free?
Yes. You can customize the template in CatInvoice and export the finished invoice as a PDF without paying for the template.
Who is this classic invoice template for?
It is designed for consultants and advisors, corporate service teams, and accounting and administrative firms. The wording and line items remain editable, so it can also support closely related services.
What can I include in the Classic template?
You can include business and client details, invoice dates, itemized quantities and rates, taxes, discounts, shipping, payment credits, terms, notes, and a final balance.
Can I add my logo and export the invoice as a PDF?
Yes. Add your logo and brand details in the editor, review the A4 preview, and export a print-ready PDF when the invoice is complete.