Self Employed Invoice Template for Hours Worked
What a self employed invoice template for hours worked for purchasing covers
Why use a template for invoicing hours and purchases
Using a template reduces errors, speeds approvals, and provides consistent documentation required by purchasing departments and auditors, improving payment timeliness and record accuracy.
Common challenges when invoicing hours and purchased items
- Inconsistent line-item descriptions lead to delayed purchase order matching and payment holds.
- Missing purchase order numbers or incorrect billing periods trigger vendor inquiries and rework.
- Unclear hourly rates or time rounding cause disputes over billed amounts and adjustments.
- Poor record retention can complicate audits and obscure expense reimbursements for purchasing.
Typical user profiles for invoicing hours and purchases
Independent Contractor
A sole proprietor who bills hourly for professional services and occasionally purchases materials for client projects. They need a clear invoice structure for purchase order matching and timely payment processing by buyers and accounts payable teams.
Small Business Owner
Operator of a small service business who tracks employee hours and reimbursable purchases. They require an invoice template that consolidates labor and costs to comply with buyer purchasing policies and streamline bookkeeping.
Who commonly uses this invoice template
Independent contractors, consultants, and small business owners often use this invoice template to bill hours and related purchases to corporate purchasing departments.
- Freelance consultants working with procurement teams on time-and-materials contracts.
- Independent contractors supplying parts or materials billed through purchase orders.
- Small vendors managing multiple purchase orders across different buyers.
The template supports clearer communication with purchasing and helps meet buyer documentation requirements, reducing payment cycle time.
Choose a better solution
Essential tools for accurate hours-and-purchases invoicing
Custom Fields
Customizable fields let you add purchase order numbers, project codes, client cost centers, and tax treatment details so each invoice matches buyer procurement requirements and simplifies automated PO matching.
Reusable Templates
Template libraries store standardized invoice formats with predefined line items and terms, enabling repeatable billing for recurring clients and reducing manual entry errors across multiple engagements.
Attachment Support
Ability to attach receipts, delivery notes, and photos of purchased items ensures proof of purchase is bundled with billed hours and materials for accounts payable review.
Audit Trail
Comprehensive logging captures who accessed, signed, or modified invoices and when, supporting dispute resolution and procurement audits with verifiable event records.
How to prepare and send the invoice online
-
Prepare Invoice: Populate template fields and attach receipts in PDF format.
-
Apply Signature: Sign electronically and record signer identity.
-
Send to Buyer: Email invoice to procurement and accounts payable addresses.
-
Archive Copy: Store a timestamped, read-only version for compliance.
Quick setup steps for your invoice template
-
01Create Header: Add business name, address, and contact details.
-
02Add PO Field: Include a mandatory purchase order number field.
-
03Detail Hours: List dates, tasks, hours, and hourly rates.
-
04Include Expenses: Itemize purchased materials and attach receipts.
Why choose airSlate SignNow
-
Free 7-day trial. Choose the plan you need and try it risk-free.
-
Honest pricing for full-featured plans. airSlate SignNow offers subscription plans with no overages or hidden fees at renewal.
-
Enterprise-grade security. airSlate SignNow helps you comply with global security standards.
Recommended workflow settings for invoice automation
| Setting Name | Configuration |
|---|---|
| Approval Chain | Two-step |
| Reminder Frequency | 48 hours |
| Auto-Archive Period | 30 days |
| Invoice Numbering | Sequential |
| Attachment Retention | 7 years |
Real-world use cases for hours-and-purchases invoices
Consultant Billing
A contractor logs weekly hours and attaches receipts for materials purchased
- Uses purchase order numbers and line-item hourly rates for each task
- Provides a consolidated billing summary to accounts payable for faster matching
Resulting in fewer holdbacks and quicker vendor payments.
Field Service Technician
A technician records onsite labor hours and parts used per service call
- The invoice includes serial numbers, purchase order references, and tax treatment for parts
- Buyer procurement staff match items against PO receipts to confirm compliance
Leading to streamlined warranty reimbursements and accurate expense recovery.
Best practices for secure and accurate billing to purchasing
FAQs About self employed invoice template for hours worked for purchasing
- How do I format hours and purchases on one invoice?
List labor and materials as separate line items with dates, descriptions, quantities, unit prices, and totals. Include a distinct subtotal for hours and a subtotal for purchased items, then combine for a final invoice total. This separation helps purchasing and accounts payable match each cost against the original purchase order and account codes.
- What purchase order information should be required?
Require the buyer’s PO number, line item reference, and project or cost center where applicable. Make PO fields mandatory in the template so invoices cannot be submitted without matching procurement details, which reduces rejections and speeds payment processing.
- Is an electronic signature legally valid for invoices in the U.S.?
Yes. Electronic signatures on invoices generally meet legal standards under ESIGN and UETA when the signer consents and the process captures intent and authentication. Maintain audit logs and signer identity information to support enforceability and buyer acceptance.
- How should I attach receipts for purchased items?
Attach legible receipts or delivery confirmations in PDF or image formats and reference them in the line item descriptions. Use a consistent naming convention and include the invoice number on each attachment to simplify matching during accounts payable review.
- What authentication is recommended for invoice signers?
Use at least one reliable authentication method such as email verification with one-time passcode or single sign-on. For higher-value transactions or HIPAA-related invoices, consider multi-factor authentication or identity proofing to strengthen signer verification.
- How long should I retain signed invoices and attachments?
Follow tax and contract requirements; a common retention period is seven years for financial documents. Ensure retained copies are immutable, securely stored, and retrievable for audits or procurement disputes to maintain compliance and support reconciliation.
Feature availability for common eSignature providers
| Feature / Criteria | signNow (Recommended) | DocuSign | Adobe Sign |
|---|---|---|---|
| ESIGN/UETA Validity | |||
| Audit Trail Included | |||
| Bulk Send Capability | Unlimited | Paid tier | Paid tier |
| HIPAA Support Options | Available | Available | Available |
Get legally-binding signatures now!
Risks and compliance penalties to watch for
Pricing overview for signing and invoice workflows
| Pricing Tier | signNow (Featured) | DocuSign | Adobe Sign | PandaDoc | HelloSign |
|---|---|---|---|---|---|
| Starting Monthly Price | $8 per user | $10 per user | $12 per user | $19 per user | $15 per user |
| Bulk Sending Included | Yes | Limited | Limited | Yes | Limited |
| API Access | Included | Paid | Included | Included | Paid |
| Document Storage | Cloud storage included | Cloud included | Cloud included | Cloud included | Cloud included |
| Advanced Security Add-on | Available | Available | Available | Available | Available |
Explore Advanced Features
- Ejemplo de Factura de Depósito para Medios de Comunicación
- Deposit Invoice Example for Construction Industry
- Deposit Invoice Example for Government
- Deposit Invoice Example for Higher Education
- Deposit Invoice Example for Legal Services
- Deposit Invoice Example for Nonprofit
- Deposit Invoice Example for Real Estate
- Deposit Invoice Example for Manufacturing



