Freelancers shouldn't pay monthly SaaS fees just to send invoices. We compare three tools with $0 monthly fees — PayPal, Stripe, and Wise Business — where your cost only arises when a client actually pays you.
If you're freelancing, every dollar that leaves your account as a software subscription is a dollar you didn't get to keep. The good news: you don't need a paid invoicing app to look professional and get paid on time. Several well-known platforms let you create and send unlimited invoices for free, with no monthly fee — you only pay a small processing fee when a client actually funds an invoice by card.
That model is ideal for cost-conscious solo operators. You're not locked into a $15–$30/month plan whether or not you invoice anyone. Instead, the cost is tied directly to money coming in.
Below are three tools that fit this "cheapest" intent, plus a few dedicated invoicing SaaS alternatives worth knowing about.
All three tools below share a common structure: $0 monthly fee, pay-per-use on funded transactions. The difference is what kind of transaction triggers a fee and who the tool is built for.
A quick note on sourcing: during research, the official pages for these tools returned connection errors, so specific fee percentages and feature details cited below come from the brief's source snippets and general platform knowledge34. Verify current rates on each provider's site before committing.
PayPal's business invoicing tool lets you create and send invoices with no monthly subscription and no limit on the number of invoices3. Fees only apply when a client pays the invoice by card — if they pay via PayPal balance or bank transfer, the cost to you can be lower.
Why it's the top pick: For most freelancers, PayPal is the path of least resistance. Your clients likely already have a PayPal account, which means fewer friction points and faster payment. The invoicing interface is straightforward, and you can track payment status, send reminders, and accept partial deposits without leaving the platform.
The trade-off: PayPal's card processing fees are on the higher side compared to dedicated payment processors, and the branding on free invoices includes PayPal's name. If you want a fully white-labeled experience, look elsewhere.
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Stripe Invoicing operates on the same pay-per-use model: no monthly fee, and you're charged only when an invoice is paid4. Where Stripe pulls ahead is automation — recurring invoices, usage-based billing, API access, and integration with just about any tool in your stack.
Why it's here: If you have clients on retainer, bill hourly with variable amounts, or want to trigger invoices from your own app or CRM, Stripe's developer-friendly approach is hard to beat. You can set up automatic payment reminders, subscription billing, and even smart retries on failed card charges.
The trade-off: Stripe's dashboard is more complex than PayPal's. If you just need to send a one-off invoice now and then, it's overkill. There's also a learning curve if you want to take advantage of the automation features.
Wise Business isn't an invoicing tool in the traditional sense — it doesn't generate invoice PDFs or send them to clients. But if you bill international clients, it's the missing piece that makes your free invoicing workflow actually cheap end-to-end.
Why it's here: When a client pays a PayPal or Stripe invoice in a foreign currency, FX conversion fees can quietly eat into your earnings. Wise Business gives you local account details in multiple currencies (USD, EUR, GBP, and more), so clients can pay you via a domestic transfer in their own currency. You then convert at Wise's mid-market rate — which is typically far cheaper than what PayPal or Stripe charge for currency conversion.
How to use it: Pair Wise with PayPal or Stripe invoicing. Send the invoice through your invoicing tool, but offer clients the option to pay via bank transfer to your Wise account for lower fees. This is especially valuable for freelancers who work with clients across multiple countries.
The trade-off: Wise doesn't handle the invoicing itself, so you'll need a separate tool (or a simple template) to generate the invoice. It's a complement, not a replacement.
The three picks above are payment-platform-first tools that include invoicing as a feature. If you want a dedicated invoicing app with a genuinely free tier, these are the category leaders — though they weren't available in our product database at the time of writing:
These dedicated tools may offer richer invoicing features (custom branding, expense tracking, time tracking) than the payment-platform picks above. If your priority is the invoice document rather than the payment processing, they're worth a look.
For the cheapest possible invoicing setup:
All three cost $0/month. You only pay when money moves — which is exactly how it should work for a freelancer watching every expense.
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