Smerdoff
Smerdoff / Billing & Revenue Systems

Custom Subscription Billing System Development

Off-the-shelf billing platforms force your pricing tiers, trials, and proration rules into their data model — and charge you a percentage of revenue for the privilege. We build a billing system around your actual plans, payment integrations, and dunning logic, so pricing changes don't mean a support ticket to a vendor.

SubscriptionsInvoicingDunningRevenue Reporting
Subscription billing dashboard showing MRR growth chart, plan breakdown, and dunning recovery queue
10–30%
of a full build is what a lean first version typically costs — validate before you commit
MVP cost research
9.4 hrs
saved per employee each week just by connecting the tools a business already uses
Zapier

Why growing SaaS teams outgrow subscription billing tools

Generic billing platforms cover standard plans well. A custom system removes the workarounds and revenue-share fees that show up once your pricing gets specific.

Pricing logic that matches your product

Usage-based tiers, seat-based add-ons, and custom enterprise contracts run as first-class rules instead of being bent to fit a vendor's plan model.

No revenue-share on every transaction

Own the billing engine outright instead of paying a percentage of processed revenue on top of your payment processor's fees.

Dunning tuned to your churn data

Retry schedules, grace periods, and win-back emails built around what actually recovers failed payments for your customer base.

Real-time MRR you can trust

Revenue, churn, and expansion metrics calculated directly from your billing events, not a delayed export from a third-party dashboard.

Proration and plan changes that don't break support

Upgrades, downgrades, and mid-cycle changes are handled with rules you define, so your team stops manually adjusting invoices.

Integrates with the stack you already run

Connects to your payment processor, accounting software, and CRM directly, instead of forcing data through a billing platform's limited integrations.

What goes into a subscription billing system

We build the modules your revenue operations need — not a bloated suite priced for enterprises ten times your size.

Plan & subscription management

Flexible plan catalog with trials, add-ons, seat counts, and custom contract terms per customer.

MRR & revenue dashboard

Live MRR growth chart, plan breakdown, and cohort reporting pulled straight from billing events.

Automated invoicing

Recurring invoices generated on schedule, with proration for mid-cycle upgrades and downgrades.

Dunning & recovery queue

Configurable retry logic for failed payments, with a queue that shows which accounts are at risk and why.

Customer billing portal

Self-service page for customers to update payment methods, view invoices, and change plans.

Payment processor integration

Connects to your existing payment processor for charge capture, refunds, and webhook-driven status updates.

FAQ

Yes. We build the billing logic — plans, proration, invoicing, dunning — as your own system, and connect it to whichever payment processor you already use for charge capture and card storage. You keep your existing payment relationship; we build what sits around it.

We configure retry schedules, grace periods, and customer notifications based on your churn patterns, and give your team a recovery queue that shows exactly which accounts are at risk and what's already been tried — instead of a generic retry timer.

Subscription billing platforms often charge a percentage of processed revenue on top of payment processing fees, which scales against you as you grow. A custom system has a higher upfront cost but no ongoing revenue share, and it's built for your specific pricing model from day one.

Yes — usage-based billing, seat-based pricing, tiered plans, and hybrid models combining several of these are common reasons teams move off generic billing tools in the first place. We design the metering and invoicing logic around how you actually charge customers.

Related

Get a free estimate for your subscription billing system

Tell us about your pricing model and current billing setup — we'll scope a system built around how you actually charge customers.