Free invoice generator for consultants

Invoice clients for advisory hours, retainers, and projects with a clean, professional document. No sign-up, unlimited, and completely private.

Your business

Add your logo to the invoice header.

Bill to

Invoice details

Line items

DescriptionQtyPriceAmount

Template Pro for premium styles

One free toolkit for freelancers

Proposal → Contract → Invoice. All free, all private — and one $12 Pro unlocks every tool.

Make an invoice in 4 steps

  1. 1

    Add your details

    Your business and your client — that's it.

  2. 2

    Add line items

    Quantity × price totals automatically.

  3. 3

    Currency, tax & discount

    Plus shipping or a deposit if you need them.

  4. 4

    Download the PDF

    One click. No sign-up, nothing uploaded.

Why Plainvo

The honest comparison most invoice tools won't show you.

PlainvoMost free generatorsInvoicing apps
Sign-up requiredNoOften (email/account)Yes
Invoice limitUnlimitedOften cappedCapped on free tier
Your dataStays in your browserUploaded to their serversStored on their servers
PriceFree · $12 onceFree → subscription$9–$30 / month
WatermarkNoneSometimesSometimes
Payment feesNoneVariesOften 3%+ per payment

A professional invoice for consultants

Consulting invoices should read as cleanly as your work. List advisory hours, fixed-scope deliverables, or a monthly retainer as separate line items, apply your tax rate, and add payment terms so clients know exactly when payment is due. Plainvo keeps the layout crisp and the math automatic.

Everything happens in your browser — your client relationships and rates never touch a server. Save your business details once, reuse them on every invoice, and export a PDF that looks like it came from a firm twice your size.

Built for the way consultants bill

Frequently asked questions

How do I invoice a monthly retainer versus hourly advisory?

Add the retainer as a single line (quantity 1, your monthly fee) and bill it at the same point each month. For advisory, add an hourly line with your rate and the hours worked. You can combine both on one invoice when a month includes extra hours beyond the retainer.

Should I show reimbursable expenses on a consulting invoice?

Yes, list pass-through expenses such as travel or software as their own lines below your fees so the client sees they are reimbursements, not billable time. If your agreement says expenses are tax-exempt, keep them separate from taxed service lines.

What payment terms should a consultant put on an invoice?

Net 15 or Net 30 is standard for advisory work. Add your terms and due date in the terms field, and consider a deposit for new clients. Clear terms up front reduce awkward follow-ups and keep your cash flow predictable.

Related templates

Plainvo Pro $12 once

Support the tool and unlock the extras — a one-time payment, yours forever. No subscription.

  • ✦ Remove the “Created with Plainvo” footer
  • ✦ Upload your own logo
  • ✦ 3 premium templates (Modern, Minimal, Bold)
  • ✦ Custom accent color to match your brand
  • ✦ Priority email support