Contractor Invoice Generator
Handles what generic invoices break on: progress billing against a contract price, separating labor from materials, and tracking what the deposit already covered.
Run Contractor Invoice Generator
Enter your numbers first, then use the niche guidance below to interpret the output against general contractors, remodelers, and trade contractors billing residential and light commercial jobs..
Who this is for
General contractors and trade specialists frequently bill construction and remodeling projects across defined project stages. Clear billing line items break down project draws and material costs so clients and lenders can track progress against contract commitments.
This tool generates manual one-off invoices based on entered quantities and unit rates. It does not manage automated retainage schedules, draw schedules, or multi-phase contract accounting, so contractors must calculate progress draw amounts externally before entering them.
Practical use cases
- Prepare an itemized invoice for remodel progress draw invoice.
- Bill fractional hours using quantity and rate; review the rounded line totals.
- Record agreed billing dates and manually computed balances in invoice notes.
Formula and inputs
The generator sums entered lines: Subtotal = Σ(Quantity × Rate). An optional single tax rate applies to the entire subtotal: Total = Subtotal + (Subtotal × Tax Rate). Construction contract features such as retainage withholding, automated progress schedules, or deposit offsets are not computed natively; contractors should calculate the net milestone draw externally and enter it as a designated line item.
Example scenario
Remodel progress draw invoice
A contractor bills a $15,200 progress milestone for completed rough-in work on a home renovation project. The contractor manually enters separate lines for rough-in labor and materials with zero sales tax.
- Line 1: Rough-in framing and plumbing labor milestone, Quantity 1, Rate $9,000.00 = $9,000.00
- Line 2: Rough-in rough materials allowance, Quantity 1, Rate $6,200.00 = $6,200.00
- Tax Rate: 0%
Entering the two components yields a $15,200.00 subtotal and total balance due. Contract context, such as cumulative amount billed to date and remaining contract balance, is added manually into the invoice memo for client transparency.
Common mistakes
- Entering a deposit or milestone percentage as though the generator subtracts or schedules it automatically.
- Applying one tax percentage when different line items require different tax treatment.
How to interpret the output
Interpretation assumptions: All amounts and tax percentages in this example are illustrative. The tool applies one user-entered tax rate to the entire subtotal. Confirm the actual tax treatment before issuing an invoice; mixed taxable and exempt items need a billing system that supports those rules.
- Each line rounds to cents before the subtotal is added; the single tax rate applies to that subtotal.
- This creates a document for one billing event. Sending, collecting payment, credits and later billing runs remain manual.
Frequently asked questions
Can I bill fractional hours?
Yes. Enter a positive fractional quantity such as 0.5 or 1.25 and the agreed rate.
Does this track deposits or recurring payments?
No. Calculate the balance or prorated charge separately, then enter the amount due as a line item. Create and send each later invoice manually.
Can each line have a different tax rate?
No. One entered percentage applies to the whole subtotal. Use a billing system that supports your actual tax rules when line items differ.
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Methodology
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Limits and review notes
This manual generator does not determine taxability, send invoices, track payments or schedule recurring billing. Review the document and applicable tax rules before issuing it.