Contractors don't invoice like freelancers. A single job can start with an estimate, take a deposit, bill in stages as work progresses, change scope halfway through and end with a final invoice weeks later. Generic invoicing tools handle the simple version. Contractor-friendly software handles the whole sequence without spreadsheets on the side. This guide explains what invoicing software actually does for contractors in 2026, which features matter for project-based work, where these tools fall short and how to choose one.
How this guide was researched: plans and fees are quoted from the official pricing pages of Square, QuickBooks Online, FreshBooks, Wave, Invoice Ninja and PayPal, checked in October 2026. This is general information, not legal or tax advice. Payment, lien and retainage rules vary by state.
What It Actually Does
The contractor invoicing sequence
| Stage | Document | What the software should do |
|---|---|---|
| 1. Quote | Estimate | Itemise labour and materials; let the client approve online. |
| 2. Start | Deposit invoice | Convert the approved estimate and request a set deposit. |
| 3. Build | Progress invoices | Bill a percentage or milestone of the estimate and track what's left. |
| 4. Changes | Change order | Record approved scope changes and add them to the job total. |
| 5. Finish | Final invoice | Bill the balance, less deposits and progress payments, and any retainage released. |
If a tool can't convert an estimate into invoices and show the remaining balance per job, you'll end up tracking it by hand.
Options contractors commonly consider (vendor-listed, October 2026)
| Tool | Cost | Payment fees (US) | Contractor-relevant features |
|---|---|---|---|
| Square Invoices | Free plan; Plus $49/month per location | Online card 3.3% + 30¢ (Free) or 2.9% + 30¢ (Plus); ACH 1%, $1 minimum (Plus adds a $10 cap) | Plus lists estimates, contracts, projects and recurring invoices. |
| QuickBooks Online | Simple Start $38/month; Plus $140/month | See QuickBooks' payment rates | Plus lists project profitability; Advanced lists construction financials. |
| FreshBooks | Lite $23/month (5 clients); Plus $43/month (50 clients) | See FreshBooks' payment rates | Estimates on all plans; Plus adds proposals, retainers and e-signatures. |
| Wave | Starter free; Pro $19/month | 2.9% + $0.60 per card payment on Starter | Unlimited estimates and invoices on the free plan. |
| Invoice Ninja | Free for 5 clients; Pro $14/month or $140/year | Depends on the payment gateway you connect | Unlimited invoicing on the free plan. |
Key Features to Compare
| Feature | Why it matters for contractors | What to check |
|---|---|---|
| Estimate-to-invoice conversion | Avoids retyping and pricing mistakes. | One-click conversion, including partial amounts. |
| Progress invoicing | Large jobs are paid in stages. | Billing by percentage or line item, with remaining balance shown. |
| Deposits | Covers materials before work starts. | Deposit requests applied automatically to the final invoice. |
| Change orders | Scope changes cause most billing disputes. | Client approval recorded and added to the job total. |
| Retainage tracking | Some commercial jobs hold back a percentage until completion. | Ability to track retained amounts and bill them later. |
| Mobile invoicing | Bill from the job site, not the office. | Full estimate and invoice creation in the phone app. |
| Payment options and fees | Large invoices make card fees expensive. | ACH or bank transfer rates and caps. |
| Job costing | Shows which jobs actually make money. | Materials and labour tracked against each job. |
What card fees cost on a contractor-sized invoice
Our calculation from vendor-listed rates, October 2026, on a $5,000 invoice paid online:
- Square Free online card (3.3% + 30¢): $165.30
- Square Plus online card (2.9% + 30¢): $145.30
- PayPal invoicing (3.49% + 49¢): $174.99
- Square Plus ACH (1%, capped at $10): $10.00
For large jobs, encouraging bank transfer instead of card can save a meaningful amount per invoice.
Where It Falls Short
- Simple tools stop at single invoices. Many free tools don't track progress billing or remaining balances per job.
- Retainage and lien paperwork vary by state. Software can track amounts, but preliminary notices, lien waivers and deadlines follow state law. Check your state's rules or ask a construction attorney.
- Field and office tools can clash. A separate scheduling or field-service app may not sync cleanly with your accounting software. Test the connection.
- Fees on big invoices. Card fees scale with invoice size, as the example above shows.
- Per-location and per-user pricing. Square Plus is priced per location, and other tools charge for extra users. Count crews and offices.
- It won't fix unclear contracts. Payment terms, deposits and change-order approval belong in your written agreement first.
How to Choose the Right One
- Map one typical job through the five stages above. Note which stages you actually use.
- Match the tool to the most complex stage you need. If you bill in stages, progress invoicing is non-negotiable.
- Compare payment costs on your average invoice, including ACH options and caps.
- Check your accounting setup. If you or your accountant use QuickBooks or another platform, choose invoicing that syncs with it.
- Test from your phone on site: create an estimate, convert it and send a deposit invoice.
What to put on every contractor invoice
- The job name or site address, so clients with several jobs know which one it is.
- The estimate or contract number it relates to.
- For progress invoices: the stage or percentage billed, amounts already paid and the remaining balance.
- Approved change orders listed separately, with their approval date.
- Any retainage held, shown as its own line.
- Payment terms, due date and accepted methods, with bank transfer listed first for large amounts.
Clear invoices get approved and paid faster, especially when a client's office has to check them against the contract.
Our quick recommendation
- Small residential jobs, solo: Square's free plan or Wave Starter.
- Staged jobs and change orders: a plan with estimates, projects and progress billing, such as Square Plus or QuickBooks Online.
- Several crews and job costing needs: a full accounting platform with project profitability, plus a field-service app if scheduling is complex.
Related reading: compare free invoicing software, or see our guide to QuickBooks alternatives if you need full accounting.
FAQs
What is progress invoicing?
Progress invoicing bills a project in stages, such as a percentage of the estimate or a completed milestone, rather than all at the end. Good software tracks what's been billed and what remains on each job.
What is the best invoicing software for contractors?
It depends on job size and complexity. Square and Wave cover simple jobs at low cost. Contractors who bill in stages, handle change orders or need job costing usually need a plan with project and progress-billing features, such as Square Plus or QuickBooks Online.
How can contractors reduce payment processing fees?
Offer bank transfer (ACH) for large invoices. Square lists ACH invoice payments at 1% with a $1 minimum, capped at $10 on Square Plus, versus a percentage plus a fixed fee for card payments.
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