For Contractors · No signup

Free Invoice Generator for Contractors

Generate professional contractor invoices for any project — milestone billing, fixed fees, time and materials. No subscription, instant PDF, your data stays private.

Create Contractor Invoice Free →

✓ No credit card✓ No signup✓ No data shared

No signup requiredData stays on deviceFree foreverInstant PDF download

Contractor Invoice Best Practices

Independent contractors need invoices that look professional and clearly communicate the scope of work delivered. A strong contractor invoice includes:

Your business name, address, and tax ID (EIN, VAT number, etc.)
Client company name, department, and billing address
Contract reference number or purchase order (PO) number — required by many corporate clients
Detailed scope of work delivered during the billing period
Billing period (e.g., "Services rendered January 2025")
Rate and total — daily rate, hourly, or fixed project fee
Payment method and banking details

Milestone vs. Time-and-Materials Billing

Milestone invoicing: Bill a fixed amount when a defined project phase is complete. Reduces payment uncertainty and is easy for corporate clients to approve against budget lines.

Time-and-materials: Invoice based on actual hours × rate plus reimbursable expenses. Best for projects with evolving scope. Use a detailed timesheet attachment.

invoicePrivate supports both formats — add multiple line items with different rates and quantities on a single invoice.

Working with Corporate Clients

When invoicing companies, you may need to include:

Purchase Order (PO) number — many companies will not pay without a matching PO
Project code or cost center for their accounting
VAT/GST number of both parties for tax compliance
30-day or 60-day payment terms — standard for enterprise procurement

Use the "Notes" field in invoicePrivate to add PO references, project codes, and other context your client's accounts payable needs.

Frequently Asked Questions

Can I create recurring invoices as a contractor?

invoicePrivate stores your last invoice settings locally, making it easy to duplicate and adjust for recurring engagements. Simply create a new invoice and your previous settings are pre-filled.

How do I handle expenses on a contractor invoice?

Add a separate line item for expenses (travel, materials, software) with a description and amount. For reimbursable expenses, note them separately from your service fees and indicate whether they are inclusive or exclusive of tax.

Is an independent contractor invoice different from a freelance invoice?

Functionally, they are the same document. "Contractor" often implies longer-term or corporate engagements, while "freelancer" suggests shorter-term project work. Both use the same invoice format.

Your First Invoice in Under Three Minutes

Free forever. No credit card, no signup, no watermarks. Open the tool and start invoicing.