Nobody runs an invoicing app as a hobby. If a tool is free, the money is coming from somewhere, and it is worth knowing where before you build your billing on it.

This is not a hit piece. Some of the free tools in this category are genuinely good, and our research found plenty of people happily using them for years. It is just that "free" is a price with the details moved somewhere less visible. There are four places they usually go.

1. A cut of every payment you take

This is the most common model, and the most expensive one, because it scales with your success rather than your usage.

One post in our research — a real public discussion, not a customer of ours — describes it better than we could:

"Client I'm working with owed me $1750. I sent him an invoice via Wave for an online payment and he paid with a credit card. My payout was $1698.65. I didn't know this would happen as it's my first time using online invoicing for clients."

Fifty-one dollars and change on one invoice. That is roughly what card processing costs — somewhere around 2.5% to 3% plus a small fixed amount per transaction is typical across the whole industry — and to be completely fair, most of it is not the app being greedy. It is the card networks, and the replies in that thread are mostly people saying so: "Cost of doing business. And a deductible expense. It's also not the worst rate out there."

In fairness to the tool in that story, someone else in the same thread pointed out that the rates were disclosed: "Wave gave you all kinds of info on the charges that are taken for Credit Card payments and ACH (direct bank payments). It's not even like it was the fine print." The surprise was the user's, not a trick.

Two honest points, though. First, the cost is real whether or not it is anyone's fault: at the volume of a working freelancer it dwarfs any subscription. A "free" tool that takes 2.9% of $60,000 a year has charged you about $1,740. Second, the fee is only unavoidable for card payments. The same thread is full of people noting that bank transfer costs nothing, and another person in our dataset put it plainly: "Most of my customers pay with direct bank transfer, zero fees."

So the free app with payment processing built in is not lying to you. It is just being paid by your clients' credit cards instead of by you.

2. A cap that binds exactly when things start going well

The second model is a genuinely free tier with a ceiling: ten invoices a month, or five clients, or no invoice emailing.

The problem is not the ceiling itself, it is where it sits. Caps in this category are almost always set just above hobby volume and just below real volume, so they bind in the first month you get properly busy — which is also the month you have the least spare attention for migrating your client list somewhere else. One person in our research described the experience of free tiers as being about "the vibe and friction": "Their onboarding feels way too heavy, the UX constantly nags you to upgrade to a paid tier."

A cap is honest when it is on the thing that costs the vendor money to serve. It is a sales tactic when it is on the thing you came for.

3. The deal changing after you have committed

The loudest, angriest material in the 768 quotes we read was about this, and we wrote it up properly in we read 768 complaints about invoicing apps. The short version: people who had used a free tier for years, built their whole billing workflow on it, and then watched basic functionality move behind a paywall.

The specific line that stuck with us was about invoice emailing being paywalled: "Composing the invoice, then... downloading it and sending it from my own email? A million times worse." Elsewhere, someone who had paid up front for "unlimited" invoicing was told the company had not removed their unlimited use, it had "updated the limitation."

Worth saying clearly: the people furious about this were not angry about the price. Several of them said the new price was reasonable. They were angry about having chosen a tool because of a promise that was later withdrawn.

And equally worth saying: the same tools are warmly recommended elsewhere in the same dataset. "I recommend Wave for online invoice handling. Free to use, free to brand, automatic reminders, and has a really great api for automations." Others named Zoho Invoice as a cheap, capable alternative to the big accounting suites, and Invoice Ninja for the self-hosting-inclined: "there's an option to self host it which I think gives you unlimited customers/invoices etc, just keeps some mild branding that you can remove with their hosted/paid plans." If one of those fits how you work, use it. The failure mode we are describing is a pricing decision, not a verdict on the software.

4. The cost of being stuck

The quietest cost. Your client list, your invoice history, your numbering sequence and your templates all live inside whichever tool you picked, and "fear of switching from existing, familiar tools despite dissatisfaction" came up repeatedly in our reading. That is a cost even when it never appears on a bill: it is the amount you will overpay later rather than spend a weekend moving.

For completeness, the genuinely-free option nobody sells you: a spreadsheet. It works. "Search for an excel template and customise it to what you need. Took me about an hour and I've been using the same one for 5 years." The honest cost there is manual invoice numbering and copy-paste mistakes — another person described exactly that grind: "its just a pain to go in and change the date, invoice number, client name+address+phone number, charges and brief description on each invoice." If you send two invoices a month, a template is a completely rational answer and you can stop reading here.

What our free tier actually is

Since we have just spent a thousand words being sceptical of free tiers, here is ours in full, with no asterisks:

1 business
Genuinely unlimited clients and invoices — no monthly invoice count, no client count
Your logo and one accent colour
All 18 invoice templates, fully customizable — there is no "premium template" upsell
A public invoice link and PDF download for every invoice
Manual payment tracking
No card, no trial clock, no expiry

And the structural bit: there is no per-transaction fee, because Charming Invoices does not process payments at all. We are not a payment company. You put your bank details, or your own payment link, on the invoice; whatever your processor charges you is between you and them and is exactly what it would be anyway. Nothing routes through us, which also means no one here can hold your money during a dispute — a thing that genuinely happened to someone in our research, whose client payments were frozen for 90 days by the tool they invoiced through.

What free honestly cannot include

We would rather state the gates than let you find them:

Free invoices carry a small "Sent with Charming" line. Paid removes it.
AI-assisted drafting is paid, because every draft is an API call that costs us real money per use.
Recurring invoices, the saved line-item and address library, and teammates are paid.
Free is one business. Paid tiers are unlimited.

We put the gates there rather than on invoice count deliberately. Capping your invoices would mean charging you for getting busier, which is the thing everyone in our research hated. Capping convenience features means the free tier stays useful forever and the paid tier has to actually be worth buying.

Why this one should not turn into story 3

Fair question, and "trust us" is not an answer. The reason is structural rather than moral:

We have no transaction fee to raise, because we do not touch your money.
Our paid tiers are one-time payments — $29 and $79 — and a licence you already own cannot be re-priced next year, because there is no next invoice to re-price. We explained that reasoning in why we built a lifetime plan.

The whole numbers are on the pricing page. If something there is less clear than this post, tell us and we will fix the page.