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Build a B2B SaaS on Laravel Multi-Tenant Architecture

Building a B2B SaaS requires a rock-solid foundation. We architect secure, multi-tenant Laravel applications with isolated tenant data, automated subscription billing, and onboarding logic designed around the decisions that are genuinely expensive to change once real customers depend on your platform.

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Production-TestedMulti-Tenant Architecture

CashierStripe & Paddle Billing

IsolatedPer-Tenant Database Design

2-3 wksTypical Build Time

Why Multi-Tenancy Decisions Are So Expensive to Get Wrong

The choice between database-per-tenant and single-database multi-tenancy isn't a preference — it's an architectural commitment that touches nearly every query, every migration, and every backup strategy in your application. Choosing the wrong model early, or defaulting to whatever a boilerplate shipped with, means retrofitting proper isolation later requires touching code across the entire codebase rather than a contained change.

Generic SaaS boilerplates and starter kits assume a simple, single-plan subscription model. Real B2B pricing usually involves seat-based tiers, usage overages, proration on mid-cycle plan changes, and annual contracts with different terms than a self-serve monthly plan. None of that fits a boilerplate's fixed billing integration, so founders end up rebuilding the billing logic from scratch anyway, having paid for a starting point that didn't actually save the hardest part of the work.

Manual tenant provisioning — someone running a script or clicking through an admin panel every time a new customer signs up — doesn't scale past the first handful of customers and introduces exactly the kind of human error that causes a new tenant's database to be misconfigured or a default role to be missing on day one.

Subscription billing implemented without proper webhook handling for plan changes, failed payments, and cancellations means your application's understanding of who's actually paying can drift out of sync with what Stripe or Paddle actually knows, sometimes for weeks before anyone notices.

Domain or subdomain routing per tenant, when bolted on rather than architected from the start, tends to break in subtle ways — a tenant's custom domain working for the main app but not for asset loading or webhook callbacks.

The architecture covered on this page is the backend foundation. For the admin interface tenants and your internal team actually use day to day, see our FilamentPHP multi-tenant SaaS dashboard work.

Core Architecture Decisions We Get Right From Day One

Database-Per-Tenant vs. Single-Database Isolation

The right isolation model chosen based on your actual compliance requirements, expected tenant count, and cost tolerance — separate databases for the strongest isolation guarantee, or scoped single-database isolation using packages like Tenancy for Laravel when tenant count makes per-database overhead impractical.

Subscription Billing via Laravel Cashier

Stripe or Paddle integrated through Laravel Cashier, handling recurring billing, plan upgrades and downgrades with correct proration, and failed payment recovery — not a custom billing implementation reinventing what Cashier already solves reliably.

Automated Tenant Onboarding

New signups provisioned automatically — tenant database or schema creation, default roles, initial configuration — with zero manual steps from your team and zero risk of a misconfigured new tenant.

Domain & Subdomain Management

Per-tenant subdomains or custom domains architected from the start, so routing, asset loading, and webhook callbacks all resolve correctly regardless of which domain a tenant is accessing your app from.

Tenant-Aware Middleware

Every request resolved to the correct tenant context before touching the database, preventing the class of bug where one tenant's request could ever accidentally read or write another tenant's data.

Billing Webhook Handling

Stripe and Paddle webhooks for plan changes, failed payments, and cancellations processed reliably, so your application's understanding of subscription status never drifts from what your billing provider actually knows.

Usage Metering Per Tenant

API calls, storage, or feature usage tracked and enforced per tenant against their actual plan limits, giving you the foundation for usage-based pricing tiers if your model needs them.

Internal Ops Visibility Across Tenants

A global view for your own team across every tenant — churn signals, usage trends, support load — the operational visibility a per-tenant view alone can't give you.

Multi-Tenancy Retrofitted Later vs. Architected From Day One

Features	Retrofitted Multi-Tenancy	Architected From Day One
True tenant data isolation, not shared-table workarounds
Billing logic built for real B2B pricing structures
New tenants provisioned automatically, zero manual steps
Domain routing correct across the entire request lifecycle
Fastest possible way to launch a single-tenant MVP
No architectural overhead if multi-tenancy is never needed

How We Architect Your Multi-Tenant SaaS

Discovery Call

A free call to understand your pricing model, expected tenant scale, compliance requirements, and which architectural decisions matter most for your specific product.

Architecture Scoping Document

Within three days, a written scope covering tenant isolation model, billing integration, and domain strategy — with a fixed price.

Two-Week Build Sprints

A working, testable foundation delivered at the end of each sprint, tested against real multi-tenant scenarios, not a single-tenant demo.

Launch & Handoff

Your architecture goes live with full documentation on tenant isolation and billing logic. Thirty days of free bug coverage follows.

Frequently Asked Questions About Laravel SaaS Architecture

It depends on your scale and compliance needs. Separate databases give the strongest isolation guarantee and are what we run for our own multi-tenant HR Payroll platform. Single-database isolation using packages like Tenancy for Laravel can be more practical at very high tenant counts where per-database overhead becomes impractical. We recommend the specific approach during scoping based on your actual numbers.

From scratch, architected around your specific requirements. Boilerplates make simplifying assumptions about pricing and isolation that rarely survive contact with real B2B requirements — we've seen founders pay for a starter kit and then rebuild the billing logic anyway because it didn't fit their actual pricing model.

Cashier handles the recurring billing lifecycle with Stripe or Paddle — subscriptions, plan changes with correct proration, and payment failure handling — while we build the webhook processing and tenant-specific logic that connects billing state to what each tenant can actually access in your application.

Yes, if that's part of your product requirements. Custom domain support is architected from the start rather than bolted on, so routing, assets, and webhooks all resolve correctly regardless of which domain a tenant is using.

Yes, typically as a FilamentPHP multi-tenant dashboard built on top of this architecture — giving your team and your tenants a proper interface rather than direct database access.

Yes — we operate our own multi-tenant HR Payroll SaaS in production, with separate databases per tenant and Paddle subscription billing. The architectural decisions we recommend for client projects are ones we've already had to get right ourselves.

Core tenant isolation, billing integration, and onboarding logic typically take two to three weeks. Projects with custom domain support, usage-based billing tiers, and complex plan structures run four to six weeks, fixed sprint by sprint in the scoping document.

Get Your SaaS Foundation Architected Right the First Time

Get the tenant isolation, billing, and onboarding decisions right from day one, on the same architecture we run our own production SaaS product on.