How-To Guide / Contractor Invoicing
Get paid the day the job's done. Not three weeks later
You finish a $5,000 job on Friday. You're tired. You'll send the invoice Monday. Monday turns into Tuesday. The client doesn't pay for 3 weeks. Meanwhile, you're floating $2,000 in materials costs on your credit card. Contractors lose $10,000-$20,000/year from slow invoicing alone. Here's how to make the invoice send itself.
01 / The Problem
You're great at doing the work. You're terrible at billing for it.
No offense, almost every contractor is. You got into this trade because you're good with your hands, not because you love paperwork. But here's what's actually happening in your business right now:
You finish a job. You're exhausted. You drive to the next job. At some point over the weekend, you remember you need to send that invoice. You open QuickBooks on your phone, get annoyed by the tiny screen, decide to do it on your laptop. The laptop doesn't happen until Tuesday.
By Tuesday, the client's sense of urgency has evaporated. They got busy too. The check doesn't come for another 2-3 weeks. Meanwhile, you're carrying $2,000+ in materials on your Home Depot card, and another $3,000 in labor costs that already left your account.
This isn't a one-time thing. It happens with almost every job. And it compounds. The average contractor has $15,000-$30,000 in outstanding invoices at any given time, money they've already earned but haven't collected because the invoicing process is manual, slow, and forgettable.
02 / Why This Matters
Late invoicing isn't just annoying. It's a cash flow crisis in slow motion.
- Time kills invoices. The longer you wait to send an invoice, the more likely it is to be disputed, forgotten, or "lost." Invoices sent same-day get paid an average of 2 weeks faster than invoices sent 3+ days later. Two weeks of cash flow, on every single job.
- You're financing your client's project. When you buy $2,000 in materials, pay your crew, and then wait 3 weeks for payment, you're essentially giving your client a free 3-week loan. At scale, this is how contractors end up cash-poor with six figures in receivables.
- Manual reminders feel awkward. Nobody likes chasing money. So you don't follow up. Or you send one polite email and then feel weird about sending another. Automated reminders remove the emotion, they just go out, professionally, on schedule.
- Forgotten invoices are real money. Every contractor has at least one job they completely forgot to invoice. At $3,000-$5,000 per job, even one missed invoice per year is devastating. Automation makes it physically impossible to forget.
Time saved on invoicing & chasing payments
In faster collections & recovered payments
Based on a contractor completing 8-15 jobs/month with an average job size of $2,000-$5,000.
03 / How to Set It Up
How to set it up, step by step
Choose your invoicing software
Jobber ($49/mo) is built for contractors, scheduling, quoting, and invoicing in one app. QuickBooks ($30/mo) is better if you need full bookkeeping. FreshBooks ($17/mo) is dead simple if you just want invoicing that works. Wave is free if budget is tight. Pick one. Don't overthink it. You can always switch later.
Create job-based invoice templates
Build templates for your most common job types. A bathroom remodel template with standard line items. A roof repair template. A general maintenance template. When the job is done, you're not building an invoice from scratch, you're selecting a template and tweaking the numbers. Takes 2 minutes instead of 20.
Set auto-send triggers
This is the magic step. In Jobber, QuickBooks, or FreshBooks, set a rule: when job status changes to "Complete" = send invoice automatically. You finish the job, mark it done on your phone, and the client gets a professional invoice in their email within 60 seconds. No laptop required. No "I'll do it later." It just happens.
Enable online payment
Turn on credit card and ACH (bank transfer) payments on every invoice. Yes, credit cards cost 2.9%. On a $5,000 job, that's $145. But contractors who offer online payment get paid an average of 11 days faster. That's worth way more than $145 when you're floating materials costs. ACH is even cheaper, usually $1-$2 per transaction.
Set up automatic payment reminders
Schedule three automated reminders: Day 3 . "Friendly reminder: invoice #1234 is due soon." Day 7 . "Just following up on invoice #1234." Day 14 . "Final notice before late fee." You never have to send an awkward "Hey, did you get my invoice?" text again. The system does the uncomfortable part for you.
04 / Tool Comparison
Which invoicing tool should you use?
Depends on whether you just need invoicing or a full job management platform. Here's the honest breakdown:
| Tool | Best For | Starting Price | Auto-Invoice | Online Payments | Setup |
|---|---|---|---|---|---|
| Jobber | Full job management + invoicing | $49/mo | Yes - on job completion | Credit card + ACH | Low - Medium |
| QuickBooks | Accounting + invoicing in one | $30/mo | Yes - recurring & triggers | Credit card + ACH | Medium |
| FreshBooks | Simple invoicing, easy to use | $17/mo | Yes - recurring invoices | Credit card + ACH | Low |
| Housecall Pro | Home service contractors | $49/mo | Yes - on job completion | Credit card | Low - Medium |
| Wave | Budget-conscious, basic needs | Free | Recurring only | Credit card + ACH | Low |
Want this handled for you?
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15 minutes. Tell us how invoicing works (or doesn't work) right now, and we'll map out exactly how to automate it, whether you hire us or not.
Book Your Free Call05 / Mistakes to Avoid
Common mistakes to avoid
Three ways contractors shoot themselves in the foot with invoicing.
1. Not accepting online payment. "I only take checks" is costing you thousands. Every day a client has to find their checkbook, write a check, find an envelope, and mail it is a day you're not getting paid. Online payment removes every friction point. Contractors who switch to online payment see their average collection time drop from 23 days to 8 days.
2. Vague line items. "Labor, $3,500" invites questions and disputes. "Kitchen demolition (2 days), $1,200, Cabinet installation (3 days), $2,300" gets paid without a phone call. Specific line items build trust and reduce back-and-forth. Build this detail into your templates once and you never have to think about it again.
3. Being too nice about late payments. You're running a business, not a charity. Set clear payment terms (Net 15 or Net 30), enable automatic late fees (1.5% monthly is standard), and let the automated reminders do the follow-up. Clients respect businesses that have professional billing systems. It actually increases trust, not decreases it.
06 / FAQ
Asked & answered.
How fast should a contractor send an invoice after completing a job?
Same day, ideally within an hour of job completion. Studies show invoices sent within 24 hours of job completion get paid an average of 2 weeks faster than invoices sent 3+ days later. The longer you wait, the less urgency the client feels. With automation, the invoice can go out the moment you mark the job complete in your app, before you even leave the jobsite.
What's the best invoicing software for contractors?
Jobber ($49/mo) is the most popular for field service contractors, it handles scheduling, quoting, invoicing, and payments in one app. QuickBooks ($30/mo) is better if you need full accounting alongside invoicing. FreshBooks ($17/mo) is great for simplicity. If you want free, Wave handles basic invoicing and payments with no monthly fee. The best choice depends on whether you need just invoicing or a full job management platform.
How do I set up automatic payment reminders?
Most invoicing tools (Jobber, QuickBooks, FreshBooks) let you schedule automatic reminders. Set three: Day 3 after invoice sent (friendly reminder), Day 7 (follow-up), and Day 14 (final notice before late fee). Keep the tone professional but direct. "Hey, just a heads up, invoice #1234 is due in 3 days. Click here to pay online." Contractors who use automated reminders get paid 30% faster on average.
Should contractors accept credit card payments?
Yes, even with the 2.9% processing fee. Contractors who offer online payment (credit card + ACH bank transfer) get paid an average of 11 days faster. The processing fee on a $5,000 job is $145. Getting paid 2 weeks faster and eliminating the check-chasing back-and-forth is worth far more than $145. Offer ACH as an option too, the fees are much lower (usually $1-$2 per transaction).
How much money do contractors lose from late invoicing?
The average contractor loses $10,000-$20,000 per year in delayed payments, write-offs, and forgotten invoices. That includes jobs where the invoice went out so late the client disputed the amount, jobs where the contractor simply forgot to invoice, and the cash flow cost of floating materials expenses while waiting for payment. Automating invoicing doesn't just save time, it directly puts money back in your account faster.
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