That gap is where payments stall. The Defense Finance and Accounting Service (DFAS) has documented this problem at the federal contracting level: incorrect or missing billing information, mismatched line items, and missing supporting documents cause invoices to be rejected and payment delayed. The same friction shows up on smaller jobs, just without the paperwork trail to prove it.
A timesheet documents work performed. An invoice requests payment for that approved work. This article covers the fields each one needs, how to connect them, and when hourly, time-and-materials, or fixed-price billing makes the most sense.
Key Takeaways
- Log customer, job or work-order number, date, worker, task, hours, billing category, and approval on every timesheet.
- Send invoices that name both parties, describe the work, show labor and expense math, and state payment terms.
- Feed approved timesheets straight into invoices so the office never retypes the same numbers.
- Capture change orders, travel, and materials before the final invoice goes out.
Contractor Timesheet Template: Fields to Include
A contractor timesheet isn't a surveillance tool. It exists to document billable work, track job costs, and give the customer confidence that the hours on the invoice actually match the work performed.
Timesheets Aren't Proof of Worker Status
Using a timesheet doesn't determine whether someone is an employee or an independent contractor. The IRS bases that determination on behavioral control, financial control, and the type of relationship between the parties, not on which forms a business uses. Treat timesheets as job-cost documentation, not as a substitute for a contractor agreement or classification decision.
Core Worker and Job Fields
Start every entry with the same basic identifiers:
- Contractor or crew-member name and company
- Customer name and job-site address
- Project or work-order number
- Service date
- Person responsible for approval
Time, Task, and Cost Details
Once the job fields are set, capture what actually drives the invoice:
- Start and end times, or total hours worked
- Regular versus overtime categories, where contractually relevant
- Billable versus non-billable status and hourly rate or rate category
- Task, phase, or service call, plus a brief description of the work
- Travel time or mileage (when billable under the contract)
- Materials, equipment charges, and subcontractor costs on time-and-materials jobs
- Customer sign-off, attachments, or notes explaining delays and return visits
Structuring the Template
Keep the layout simple and consistent:
- One row per work entry, not one row per day
- Locked calculation cells for hours and totals
- Separate columns for approval status and invoice status
Match detail level to how you bill:
- Hourly or T&M: detailed entries for every task
- Fixed-price or milestone: same timesheet for internal cost tracking; bill from deliverable or milestone approval
Contractor Invoice Template: What to Include
An invoice is the formal payment request created once work, hours, or a milestone has been approved. It should stand on its own, without forcing the customer to dig through texts or old estimates to understand what they're paying for.
Header and Business Information
The Federal Acquisition Regulation invoice standards are a solid checklist for private field-service work too. Include:
- Unique invoice number and invoice date
- Contractor business name, mailing address, and contact details
- Customer name and billing address
- Project or work-order reference
Turning Timesheets Into Labor Line Items
Skip the vague "labor" line. Pull directly from the approved timesheet instead:
- Service date or billing period
- Description of work performed
- Worker or crew category, where useful
- Quantity of hours or units, rate, and line-item amount
Materials, Travel, and Reimbursable Costs
Separate everything that isn't labor:
- Materials and mileage
- Travel time and equipment rental
- Disposal fees and permits
- Approved change orders
Note whether receipts or supporting documentation need to accompany the invoice, particularly for larger material purchases.
Calculations, Payment Terms, and a Tax Caution
Finish with totals and payment terms:
- Subtotal, discounts or credits, and applicable sales tax
- Deposits or retainers applied, total due, and balance due
- Payment due date, late-payment terms, and accepted payment methods
Sales tax treatment on labor and materials varies by state and by service type. Some states tax repair and maintenance labor; others treat capital-improvement work differently. Confirm your obligations with a qualified tax professional—don't assume one rule applies everywhere.
How to Connect Contractor Timesheets and Invoices
The workflow that prevents payment delays is straightforward: capture the work, review it against the scope, approve it, convert it into invoice lines, attach supporting documentation, and track payment. The hard part is doing it consistently.
Set the Rules Before Work Begins
Decide these details before the first hour is logged:
- Billing rates and work-order numbering
- Billable categories and expense rules
- Approval deadlines and required customer signatures
- Invoice frequency and who's authorized to approve hours or change orders
From Field Entry to Office Review
Crews should submit entries close to the time of work, not at the end of the week. Waiting introduces guesswork, especially across multiple job sites.
Office staff then check for missing details and duplicates. Project managers compare hours and expenses against the estimate or contract.
Handle Exceptions Before You Invoice
Route these issues for clarification instead of burying them in the invoice:
- Over-budget hours or disputed time
- Missing notes or unapproved materials
- Return visits and scope changes
Manual vs. Connected Workflows
| Manual Process | Connected Workflow |
|---|---|
| Spreadsheets and email attachments | Shared job and work-order IDs across systems |
| Duplicate data entry between field and office | Timesheet data flows directly into invoice lines |
| Paper timesheets, separate invoicing tool | Schedules, crew time, invoices, and payments in one place |
A connected workflow closes that gap. SolvPro combines work orders, crew time tracking, invoicing, and payments in one place.
With QuickBooks Online sync and NMI payment processing built in, approved field hours become invoice lines without retyping.
Contractor Timesheet and Invoice Best Practices
Submission and Approval Cadence
Capture time daily for active field work and review it at least weekly. Match invoice frequency to the contract and customer expectations, not to whatever's convenient for the office that week.
Common Mistakes to Avoid
These errors show up constantly and slow down payment every time:
- Vague work descriptions instead of specific task notes
- Missing job or work-order numbers on entries
- Mixing billable and non-billable time on the same line
- Invoicing change orders that were never formally approved
- Combining materials and labor into one lump sum
- Sending invoices without stated payment terms
Recordkeeping and Classification Reminders
Keep contracts, estimates, signed approvals, timesheets, receipts, and invoices organized with consistent naming so anyone in the office can pull up the supporting record fast.
Use timesheets for job costing; keep a separate signed contractor agreement on file. If work arrangements raise classification questions, get professional advice rather than guessing.
Conclusion
A timesheet records what work happened and what it cost. An invoice turns that approved work into a clear request for payment. When the two are disconnected, everyone pays for it: the office chases missing details, the customer questions the bill, and the contractor waits longer for money already earned.
Start with the basics that keep both documents aligned:
- Consistent fields on every timesheet and invoice
- Job-level references that carry from field record to bill
- Timely approvals before anything goes out the door
Connect the field record directly to the invoice instead of retyping it. The payoff is fewer disputes, faster office processing, and quicker payment.
Frequently Asked Questions
What should a contractor invoice include?
An invoice needs a number and date, contractor and customer details, a project or work-order reference, itemized labor and expenses, subtotal, applicable tax, total due, payment terms, and payment instructions.
What should a contractor timesheet include?
A timesheet should capture the worker, customer, job or work-order number, date, task description, hours or units, billing category, expenses, notes, and approval status.
How do you turn a timesheet into an invoice?
Group approved time entries by job or billing period, multiply by the agreed rate, then add authorized expenses and materials. Present the result as itemized invoice lines that match the timesheet.
Should contractors submit timesheets with invoices?
Supporting timesheets are useful for hourly or time-and-materials billing, but whether they're required depends on the contract or the customer's own process.
What is the difference between a contractor timesheet and an invoice?
A timesheet is a record of work performed and hours logged. An invoice is the formal request for payment based on that approved work.
How often should contractor timesheets be submitted?
Capture time close to when the work happens, then submit it according to the agreed schedule, whether that's daily, weekly, per milestone, or tied to the billing period.
