SaaS Product Development
Billing and payments your finance team can trust
Money should be the most reliable part of your product. We build billing that charges correctly, reconciles cleanly and gives finance the reports they need.
The problem
The problem this solves
Billing bugs are the most expensive kind. Charge a customer twice and you lose their trust. Fail to charge them and you lose revenue without noticing. Get tax wrong and you have a problem with the authorities. Yet billing logic is often written quickly, spread across the codebase and tested by hand.
Finance teams feel the result every month. Payments in the payment provider do not match invoices in the product, which do not match the accounting system. Refunds are processed in one place and forgotten in another. Month-end close turns into detective work.
We treat billing as a system of its own. One source of truth for what each customer owes, a proven payment provider for moving money, and automatic sync to your accounting software. Every event, whether a charge, refund, dispute or credit, is recorded and traceable. Pair it with automated invoice processing on the payables side and your finance team spends its time on analysis, not reconciliation.
Where money is involved, we are deliberately conservative. We test every scenario with the provider's test tools, keep a clear log of every event and never store card details on your servers.
What you get
What you get
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Checkout and saved payment methods
Secure card and wallet payments through Stripe or another trusted provider.
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Invoices and credit notes
Correct invoices with tax, numbering and your branding, plus credit notes for adjustments.
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Subscriptions and usage billing
Recurring plans, metered usage and seats, calculated in one tested place.
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Refunds and disputes
Refund flows for your team and a process for handling disputes and chargebacks.
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Tax handling
Sales tax or VAT calculated by region with the provider's tax tools or your accountant's rules.
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Accounting sync
Invoices and payments synced to Xero, QuickBooks or your accounting system.
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Finance reporting
Revenue, outstanding balances, refunds and disputes in reports finance can rely on.
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Complete audit trail
Every billing event logged and linked to the customer and invoice.
How we build it
How we build it
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1
Map the money flows
We list every way money moves: charges, refunds, credits, payouts and taxes.
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2
Design
Customer billing screens and finance tools designed with your finance team.
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3
Build
Billing logic, provider integration and webhook handling built with tests for every scenario.
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4
Reconciliation tests
We run test transactions and check product, provider and accounting all agree.
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5
Go live
Launch with monitoring on every billing event and alerts on anything unusual.
AI and people
Where AI helps, where people decide
AI makes the repetitive parts faster. The decisions that shape your product stay with experienced people.
Where AI speeds things up
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Listing money-flow scenarios and edge cases to test.
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Generating integration code and tests for each billing event.
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Building finance reports and export formats.
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Checking reconciliation data for mismatches.
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Drafting the finance team guide to refunds, credits and disputes.
Where people decide
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Pricing, tax treatment and refund policy, with your accountant.
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Which scenarios need manual approval.
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The source of truth when systems disagree.
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Whether billing is correct enough to charge real customers.
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How disputes and chargebacks are answered.
Is this right for you?
When this is the right choice
A good fit when
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Invoices, payments and accounting do not match at month end.
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Billing logic is scattered and hard to change.
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You are adding usage-based or seat-based pricing.
Consider something else when
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You only need a simple subscription checkout. Start with a subscription platform setup.
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You invoice a few clients by hand each month and it takes minutes.
Timeline and cost
What affects the timeline and cost
A standard billing integration with invoices and accounting sync takes a few weeks. Usage-based billing, multiple entities, several currencies or a migration from another billing system add time. We always run a full set of test transactions and a reconciliation check before the first real charge.
We do not publish fixed prices because scope drives cost. How we estimate.
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Pricing complexity
Usage and seat-based pricing need careful metering and testing.
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Currencies and tax regions
Each adds rules to handle and test.
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Legal entities
Billing from more than one company adds accounting setup.
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Accounting integration
Two-way sync takes longer than a one-way export.
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Migration of history
Moving past invoices and subscriptions from another system needs care.
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Audit and compliance
Businesses that are audited need stricter records, approvals and reports.
Keep exploring
Related services, solutions and reading
Related services
View all related services- SaaS Product Development MVPs, subscription platforms, admin panels and multi-tenant products, planned to grow past the first launch.
- Subscription platforms Products people pay for monthly or yearly, with plans, trials, upgrades and billing that just works.
- Payment integration Stripe, PayPal and local gateways wired into your site or app, with receipts, refunds and reconciliation.
- Automation and Integrations CRM, payment and API integrations, MCP connections and workflows that stop people copying data by hand.
- API development Well-documented APIs that let your product talk to apps, partners and AI tools reliably.
- Ecommerce websites Online stores with clean product catalogs, simple checkout and the integrations that keep orders moving.
Solutions
View all solutions- Invoice processing Read supplier invoices, match them to orders and push approved ones into accounting, with exceptions flagged for review.
- Receipt capture and matching Snap a receipt, and the details are read, categorized and matched to the card transaction and the right project.
- AI-assisted content workflows Briefs, first drafts, edits and repurposing in a workflow where people set the angle and approve every word.
- AI automation and integrations Connect the tools you already use so data moves once, correctly, and AI reads the parts that arrive as text or documents.
- AI support agent An assistant that answers routine questions from your own content, checks orders and hands anything else to a person.
- AI translation workflows Translate websites, products and support content quickly with AI, a shared glossary and native-speaker review where it matters.
Industries
View all industries- SaaS and startups MVPs, subscription billing, AI features, multi-tenant platforms and scaling support for founders and product teams.
- Ecommerce Online stores, product data cleanup, support assistants, price monitoring and order automation for online retailers.
- Finance and accounting Client portals, document collection, invoice and receipt processing, and reporting for accounting firms and finance teams.
- Logistics and transportation Driver apps, order and shipment tracking, document processing and integrations for logistics and delivery companies.
Guides and articles
View all guides and articlesAI models
View all ai models- Vision and multimodal Models that read images, scans, screenshots and sometimes audio or video alongside text.
- Gemini 3.8 Flash Google's most capable Flash model, stable since September 2026, for agents, software engineering and enterprise workflows with full multimodal input.
- Mistral OCR 4.1 Mistral's document OCR model, turning pages into structured output with bounding boxes, block labels and confidence scores.
MCP servers
View all mcp servers- Payments and billing Servers for payment providers and accounting systems: customers, invoices, payments, refunds and bookkeeping.
- Stripe Stripe's official MCP server lets AI search and read Stripe data, make changes with confirmation for sensitive actions, run analytics and search docs.
- PayPal PayPal's official MCP server lets AI create and send invoices, manage orders, refunds, disputes, subscriptions, shipment tracking and transactions.
- QuickBooks Online Intuit's official QuickBooks Online MCP server lets AI search and create customers, invoices, bills and payments and pull financial reports.
- Square Square's official MCP server lets AI reach the whole Square API, from payments and customers to catalog, inventory and bookings, through one request tool.
- Xero Xero's official MCP server lets AI list and create contacts, invoices and payments, read bank transactions and pull reports such as profit and loss.
Glossary terms
View all glossary terms- Webhook A webhook is an automatic message one system sends to another's web address when something happens, such as a payment or a new order.
- API integration An API integration connects two or more systems through their APIs so data and actions flow between them automatically.
- SaaS SaaS, or software as a service, is software delivered over the internet on a subscription, rather than installed and owned by each customer.
- API An API, or application programming interface, is a defined way for one piece of software to request data or actions from another.
- OCR OCR, or optical character recognition, is technology that turns text in images and scanned documents into machine-readable text.
- REST API A REST API is a common style of web API where systems use standard web requests, such as GET and POST, to read and change resources at specific URLs.
FAQ
Questions about billing and payments
Have a question that is not here? Ask us directly.
No. Card details go straight to the payment provider, which is certified to handle them. Your product stores only a reference, which keeps your security requirements much lighter.
Yes. We commonly sync invoices, payments and refunds to Xero or QuickBooks, so finance does not re-enter anything.
By keeping billing logic in one tested place, testing every scenario with provider test tools, reconciling test data across systems before launch and alerting on anything unusual after launch.
Yes. We meter the relevant usage, report it to the billing provider and show customers their usage before they are charged. See subscription platforms.