- Allowance
- A line item in an estimate set aside for a category the customer hasn't selected yet — fixtures, finishes, tile. Set at a target dollar amount; the customer upgrades or downgrades via change order based on what they actually pick.
- ACH
- Automated Clearing House. The US bank-to-bank transfer network. Cheaper than card payments (typically 0.8% capped at $5 vs 2.9% + 30¢) but slower (1-3 business days). Most contractors prefer ACH for invoices over $1,000.
- Aging report
- List of unpaid invoices grouped by how overdue they are: current, 1-30 days, 31-60 days, 61-90 days, over 90 days. The contractor's most important cash-flow document.
- Change order
- A written modification to the original signed contract. Adds (or subtracts) scope, cost, and time. Should be signed before the work is done, billed on the next invoice.
- Deposit
- Payment collected from a customer at contract signing, before work begins. Usually 10–50% of the total contract value depending on trade and job size. Funds material orders and reserves the customer's place on your schedule.
- Draw schedule
- A milestone-based payment plan that releases funds as a job progresses. Common on larger jobs — 10% deposit, 20% at rough-in, 30% at drywall, 30% at finish, 10% on closeout, for example.
- Lien waiver
- A document signed by a contractor (or sub or supplier) confirming they've been paid for work on a specific job and waiving any mechanic's lien rights. Customers ask for these before final payment.
- Markup
- The percentage added on top of your material cost or labor cost when quoting the customer. Industry norm: 15–25% on materials, 25–40% on labor. Covers overhead, risk, and profit.
- Net 30
- Payment due 30 days from the invoice date. Other common terms: Net 7, Net 14, Net 15, Due on receipt.
- Progress billing
- Billing a long job in stages instead of one final invoice. Each stage's invoice covers work completed in that period. Matches cash flow to actual work.
- Retainage
- A percentage of each payment (usually 5–10%) withheld by the customer until the job is fully complete and accepted. Common on commercial and larger residential work. Released as a separate final payment.
- T&M (Time and materials)
- Billing model where the customer pays for actual labor hours plus material costs (with markup), as opposed to a fixed price quoted upfront. Used when scope is uncertain.