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IT Consulting Invoice Template

An IT consulting invoice has to survive a client's finance team and its IT manager at the same time. Finance wants the contract, purchase order and totals to match; the IT manager wants to see which phase, tickets or hours each charge relates to. This template adds those details to an ordinary invoice: the statement of work (SOW) reference, project phase or milestone, time entries by date and task, the rate type (hourly, daily, fixed fee or retainer), change requests outside the original scope, after-hours work, retainer hours used, support ticket references, software licences or hardware passed through, and reimbursable expenses. The download is an editable HTML invoice with invoice number, dates, a line-item table and totals. Fill it in your browser, then print it or save it as PDF. To create and send invoices from an account, InvoiceQuickly turns a typed or spoken description of the work into an editable invoice draft you review before saving.

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Download the HTML file to edit its fields, then print or save as PDF. Totals are entered manually.

What This Template Includes

  • Statement of work (SOW) or contract reference
  • Client purchase order number
  • Project phase or milestone and its status
  • Rate type: hourly, daily, fixed fee or retainer
  • Time entries by date, person and task
  • Change requests billed outside the original scope
  • After-hours or emergency rate, if agreed
  • Retainer hours included, used and carried over
  • Support ticket or work-order references
  • Software licences and hardware passed through (vendor, period)
  • Reimbursable expenses with receipts

How to Create Your IT Consulting Invoice

  1. 01

    Describe your work

    Type a plain English description of the services you provided, the client, and the amount.

  2. 02

    AI generates your invoice

    InvoiceQuickly's AI drafts the client, line items, dates, and totals for you to review before saving.

  3. 03

    Review, download, and send

    Check every detail, download the PDF, or use Pro to email the PDF directly to your client.

Recommended Payment Terms

Set the terms in the SOW and copy them onto every invoice. For fixed-fee projects, tie each invoice to a milestone the client has signed off, so the approval and the bill arrive together. For hourly or daily work, invoice monthly with the time entries attached. Business clients often pay on net 30 and need a purchase order number before they can pay, so get the PO before you start. Bill managed-support retainers in advance at the start of each month, and bill hours above the retainer in arrears on the next invoice. Licences you buy on the client's behalf can be billed when you place the order, so you are not financing their software.

Need help writing payment terms? Read our guide to invoice payment terms for best practices and templates.

Tax Information

In the US, many states do not tax consulting labour on its own, but some tax a wide range of services, and states treat software licences, SaaS subscriptions, hardware and some IT services in different ways, and the answer can change when you resell a product rather than advise on it. Check your state's department of revenue before you pass licences or equipment through on your invoice. Independent consultants are paid gross and handle their own income and self-employment tax; the IRS says business clients file Form 1099-NEC for payments totalling $2,000 or more in a calendar year for payments made after December 31, 2025 ($600 before that). Outside the US, VAT or GST applies once you are registered, and services to business clients abroad often follow place-of-supply or reverse-charge rules. InvoiceQuickly applies one tax percentage to the whole invoice and copies saved business and client tax IDs to new invoice PDFs, so if only the resold licences are taxable, put them on a separate invoice or work the tax out yourself.

Industry context (2026)

Published 'IT consultant rate' tables rarely say who was surveyed or when, so this page does not use them. The best dated public figure is for employees. The US Bureau of Labor Statistics' Occupational Outlook Handbook for computer systems analysts (page modified 27 August 2026) reports a median wage of $105,850 in May 2025, or $50.89 an hour, across about 544,400 jobs. The largest employer of these analysts is the computer systems design and related services industry, with 23% of jobs, and BLS notes that analysts often work as contractors for IT firms. BLS pay figures exclude the self-employed, and an employer also pays for benefits, payroll taxes, equipment and non-billable time, so an independent consultant's hourly rate has to be several times the median wage to earn the same. The worked example shows how to calculate your own floor instead. On the tax side, the IRS raised the Form 1099-NEC reporting threshold to $2,000 for payments made after December 31, 2025.

Worked example

Worked example: Sam Okafor, an independent IT consultant, is moving a 30-person architecture practice from on-premises email and file shares to a cloud suite under SOW-114, with three fixed-fee phases, change requests at $165 an hour, after-hours work at 1.5 times that rate, and net 30 terms against purchase order PO-5520. Invoice INV-0207 for October lists: Phase 2 of 3, mailbox and file migration, signed off 24 October, fixed fee $6,000.00; change request CR-03, conditional access for 2 contractor accounts, approved 9 October, 6 hours at $165 = $990.00; Saturday cutover support on 18 October, 4 hours at $247.50 = $990.00; cloud backup licences, 30 users for November at $3.00 = $90.00, at cost, vendor invoice attached; parking at the client's office, at cost, $24.00. Total $8,094.00, due in 30 days. No tax line is added in this example; Sam checked how his state treats the resold backup licences before invoicing, and the answer differs between states. The $165 rate is Sam's own, set from his rate floor: he needs $165,000 a year and expects about 1,000 billable hours, so $165,000 / 1,000 = $165 an hour. It is a labelled calculation, not a market benchmark.

Common mistakes to avoid

Invoicing 'IT services, October'

A one-line invoice cannot be matched to the SOW or the purchase order, so it waits in the client's approval queue. Reference the phase, change requests and tickets.

Absorbing change requests

Small favours outside the SOW add up to unpaid days. Log each one, get approval and bill it on its own line.

Financing the client's licences

Paying for annual licences and billing them at month end leaves you out of pocket. Bill licences when you order them and state the period.

Weekend work at the normal rate

If an after-hours rate was not agreed in advance, it is hard to charge after the cutover. Put it in the SOW and show it as a separate line.

No purchase order number

Many companies cannot pay an invoice without one. Ask for the PO before work starts and quote it on every invoice.

Invoicing Tips

  • 1Quote the SOW and phase on every invoice, for example 'SOW-114, Phase 2 of 3: migration', so the client can match it to the contract without a call.
  • 2Bill change requests on their own lines with the change request number and the client's approval date. Unbilled small changes are where IT project margins disappear.
  • 3Attach time entries for hourly work, grouped by task, and keep descriptions specific: 'Configured conditional access for 2 contractor accounts' rather than 'admin work'.
  • 4Pass licences through at cost with the vendor invoice, or show your markup openly, and state the licence period so renewals are not a surprise.
  • 5Show retainer hours as included, used and remaining, and say whether unused hours carry over.
  • 6Agree an after-hours rate in writing before the first weekend cutover, then show it as a separate line with the date and hours.

Related Resources

Frequently Asked Questions

What should an IT consulting invoice include?

Your and the client's details, invoice number, issue and due dates, the SOW and purchase order references, the phase or milestone, time entries or fixed-fee lines, change requests, retainer hours used, ticket references for support work, licences or hardware passed through, expenses, the total and payment instructions.

How do IT consultants bill clients?

By the hour or day for open-ended work, by fixed fee per phase or milestone for defined projects, and by monthly retainer for ongoing support. Many combine them: a fixed fee for the project, an hourly rate for change requests, and a retainer once the system is live.

How much should an IT consultant charge per hour?

There is no reliable public table of independent IT consulting rates. Start from your own rate floor: the revenue your business needs in a year divided by the hours you can realistically bill. For comparison, the US Bureau of Labor Statistics puts the median wage for employed computer systems analysts at $50.89 an hour in May 2025, and an independent consultant has to charge well above that to cover benefits, tools, self-employment tax and unbilled time.

Should software licences go on my consulting invoice?

If you buy them for the client, yes, as separate lines with the vendor, quantity and licence period, at cost or with a stated markup. Check whether reselling them is taxable in your state, because licences and SaaS are often taxed differently from consulting time.

How do I invoice a change request?

Put it on its own line with the change request number, the client's approval date and the hours or fixed price agreed, separate from the original SOW lines. That keeps the original budget clean and shows the client what they added.

Can I make an IT consulting invoice in InvoiceQuickly?

Yes. Describe the work in plain English or by voice and InvoiceQuickly drafts the client, line items, rates and terms into an editable invoice you review before saving. Pro ($9 a month) adds email delivery, recurring invoice schedules for retainers, payment links through your own Stripe or PayPal account, and time tracking: log hours by project with a timer or manual entries, then bill selected hours into one draft invoice. Business ($19 a month) can also import entries from Clockify, Toggl Track, Harvest or ClickUp. It does not import timesheet files, so hours kept in a spreadsheet go in as lines.