Don't build your own invoicing

You want to.

The model will vibe-code the invoices and the dunning emails. Your case looks easy: you are B2C, you have no deals, coupons are not your cup of tea. Wiring up a billing provider feels like a tax you cannot afford before the next raise. Roll your own and you can claim ~1% higher margins.

Do not build it.

Point at someone else

You will need growth numbers that survive a follow-up question. “How do you count MRR?” should be answered by pointing at a third party, not by walking through your weekend schema. Homemade metrics become a debate.

Taxes and compliance

Invoicing is money moving under rules that change when a customer sits in another country. VAT, receipt format, who is allowed to store the card. You can ignore that for a month. You cannot ignore it for a company.

You will offer deals

You say coupons are not your thing. Then a partner wants 20% off for a launch. Then someone asks for a yearly plan. Billing providers already have this. You will spend a month reinventing it, one week at a time, while the product that actually differentiates you waits.

Spend the time elsewhere

Vibe coding looks cheaper than an integration because the fee is on an invoice and your weeks are not. Invoicing does not set you apart. Sit with customers. Ship the thing only you can ship.

A billing bug is a trust bug

A UI glitch gets a shrug. Charge someone twice, or send an invoice that does not match what they bought, and they treat it as who you are. You lose that customer, then the ones they tell. Accounting mistakes are not “we’ll patch it Monday.”

You won’t fix it later

We just need to invoice something now. We can always switch to Stripe later.

You won’t replace your inhouse invoicing system until it’s a huge pain in the ass. As it will be.

Pay the provider fee.

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