How to Invoice as a IT Consultant: Step-by-Step Guide

How it consultants structure their invoices: 5 standard line items, 0% deposit (industry norm), Net 30 terms, and $2,800 average invoice size. Read the full breakdown.

Avg invoice
$2,800
Net terms
30 days
Deposit
0%
Line items
5
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1. What every it consultant invoice must include

A compliant it consultant invoice has eight parts: your business name and contact info, a unique invoice number, issue date, payment due date, the customer's name and address, an itemized list of work, the total amount due, and accepted payment methods. If you're collecting sales tax, that line is required too.

2. Set your line items

Most it consultants structure invoices around these 5 categories:

  • Block-of-hours retainer — billed by flat.
  • Onsite labor — billed by hour at a ~$175 default.
  • Remote labor — billed by hour at a ~$145 default.
  • After-hours surcharge — billed by pct.
  • Hardware — billed by itemized.

3. Set payment terms

The standard for it consultants is Net 30 — payment due within 30 days of the invoice date.0 Spell out late-fee terms (most states cap monthly late fees around 1.5%) and accepted payment methods on the invoice itself.

4. Licensing & legal disclosures

No general license. Vendor certifications (Microsoft, Cisco, AWS) drive credibility. SOC 2 expected for handling client data.

5. Send and follow up

Send the invoice the same day work is completed (or upon milestone for larger projects). Use software that tracks opens and lets the customer pay by card or bank transfer in one click — the average it consultant-class invoice gets paid 2× faster when the customer can pay online without leaving their inbox.

Average invoice
$2,800
Standard terms
Net 30
Typical deposit
0%
BLS code
15-1232

State-by-state it consultant invoicing guides

State rules differ on sales tax, statutory late fees, and contractor disclosure requirements. Pick your state for a guide tuned to local law.

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