Commerce & Payments · Commerce & Payments
Should you build or buy Invoicing & Billing?
Invoicing and billing software handles the creation, delivery, tracking, and collection of invoices for goods and services — covering line-item generation, payment terms, automated reminders, and integration with accounting systems to close the revenue loop from delivery to cash.
The build-vs-buy decision for Invoicing & Billing turns on how complex your pricing model is and whether you're approaching the revenue threshold where percentage-based vendor fees become a material cost, since open-source billing infrastructure has genuinely commoditized the basic layer while compliance and payment collection still anchor most businesses to vendor solutions.
Build it, buy it, or bridge?
When building makes sense
Building invoicing infrastructure is defensible at scale and for complex pricing models. Lago's self-hosted tier replicates capabilities that Stripe charges hundreds of dollars per month for, with no per-event fees, and avoids percentage-based fees that become material around $10 to $15 million ARR. Open-source platforms like Invoice Ninja and Crater are production-ready for SMB and freelance invoicing and provide a credible starting point for teams that want no ongoing vendor fees. The build case also applies when your pricing model involves usage-based billing or custom contract terms that standard invoice templates can't accommodate. The meaningful caveat is that building the invoicing logic layer is tractable, but payment processing, tax compliance, and accounting integration still push most self-built billing systems back toward vendor components — you're rarely building everything from scratch.
When buying makes sense
Buying invoicing software earns its keep for most businesses where invoicing is pure back-office infrastructure and the goal is accuracy and efficiency rather than differentiation. FreshBooks and Stripe Invoicing cover invoice creation, payment collection, and basic accounting at commodity pricing, and Stripe's bundled invoicing makes standalone tools redundant for companies already on Stripe. The buy case is strongest when billing is simple — fixed-price projects, flat subscriptions, or hourly billing — and when your team doesn't want to own the logic as payment terms and pricing models evolve. For businesses that invoice in multiple currencies or need accounting system sync, the vendor ecosystem handles integration work that would otherwise fall on engineering.
The desk read
For most businesses, invoicing is pure back-office infrastructure. Tools like FreshBooks and Stripe Invoicing cover invoice creation, payment collection, and basic accounting at commodity pricing, and Stripe's bundled invoicing makes standalone tools redundant for companies already on Stripe. The buy case is strongest when your billing is simple and you want no maintenance burden.
The build case gets interesting at scale and for complex pricing models. Lago's self-hosted tier replicates capabilities that Stripe charges hundreds per month for, with no per-event fees. Percentage-based fees on transactional tools become material around $10-15M ARR. That's the inflection point where owning the billing layer starts to pay off, but it requires sustained engineering investment and still pushes payment processing and compliance back to a vendor anyway.
Frequently asked
What is Invoicing & Billing software?
Invoicing and billing software handles the creation, delivery, tracking, and collection of invoices for goods and services — covering line-item generation, payment terms, automated reminders, and integration with accounting systems to close the revenue loop from delivery to cash.
When does building Invoicing & Billing make sense?
Building becomes defensible around $10-15M ARR where percentage-based vendor fees become material, or when your pricing model requires usage-based metering that standard invoice templates can't handle. Open-source platforms like Lago and Invoice Ninja have reached production maturity.
When does buying Invoicing & Billing make sense?
Buying earns its keep when invoicing is back-office infrastructure with standard billing patterns. FreshBooks and Stripe Invoicing at commodity pricing cover most needs, and the maintenance-free path is the right call when your team's time is better spent on differentiation.
What are the main Invoicing & Billing vendors?
Representative vendors include QuickBooks Online, Stripe Invoicing, FreshBooks, Wave. B4 Pro scores the full set.