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How much does it cost to build a SaaS platform?
6 min read
Building a SaaS platform costs more than building an internal application of similar size, because software sold online to many companies must also keep each customer's data separate, manage subscriptions and billing, take payments and stay up around the clock. The total cost has two parts: building the first version, and running it, which starts on launch day and never stops.
This guide covers the components that are specific to SaaS, what your first version can safely leave out, and the recurring costs to put in the business plan from the start.
SaaS is not just another application
An internal business application serves one company, with its own users, rules and hosting. A SaaS product serves dozens or hundreds of companies on a single platform. That difference adds building blocks that simply do not exist elsewhere.
| Building block | Internal application | SaaS platform |
|---|---|---|
| Customers | One company | Many companies, data kept separate |
| Accounts | Known users set up by IT | Self-service sign-up, invitations, roles per customer |
| Billing | None, or internal | Plans, trials, upgrades and downgrades, invoices, dunning |
| Payments | None | Online collection, failed payments, refunds |
| Availability | Business hours | Continuous, for every customer at once |
| Support | The internal team | Help content, support requests, account recovery |
Every line in the right-hand column is development, testing and an ongoing operating responsibility. That is why a SaaS quote should never be compared with a quote for an internal tool that happens to show the same screens.
Where the money goes
Multi-tenancy. Isolating each customer's data, guaranteeing that a user never sees another tenant's records, and handling permissions inside each account is the architecture of the product itself. It has to be designed in from the start, because it is very hard to retrofit.
Subscriptions and billing. Plans, free trials, mid-cycle upgrades and downgrades, compliant invoices, retries when a card fails. Payment providers supply much of the machinery, but wiring it cleanly into your product is real work, and the edge cases (proration, taxes by country, refunds) are where the hours go.
The core feature. This is why customers pay: scheduling, quoting, tracking, producing. It is usually the easiest part to describe and the longest to make reliable, because it carries the business rules.
Security and compliance. Strong authentication, audit logs, tested backups, and personal data handled in line with the GDPR if you sell in Europe. In a SaaS product, one vulnerability exposes every customer, not just one.
Internal admin tools. You will need your own screens to look up accounts, help a stuck customer, follow subscriptions and deactivate users. This back office is rarely in the first estimate, and it is always needed in the first week.
What version one can leave out
A useful first version does not need everything. A practical rule: anything hard to add later belongs in version one; anything that can be bolted on without rework waits. Tenant isolation, roles and billing go in. Advanced analytics, secondary integrations, a mobile app and per-customer customisation wait.
That is the logic of a minimum viable product, covered in our guide MVP development: what to build first. A 2019 study by the product analytics vendor Pendo, based on usage data from 615 subscriptions, estimated that 80% of features in the average software product are rarely or never used: a good reason to distrust an overloaded version one.
Running costs to budget from day one
A SaaS product keeps costing money after launch. The items are always the same; only the amounts change with usage.
| Recurring cost | What makes it grow |
|---|---|
| Hosting, database, storage | Active customers, data volume |
| Backups and monitoring | How fast you must recover from an incident |
| Payment processing | Revenue collected |
| Transactional email | Number of accounts and notifications |
| Security updates and fixes | Number of technical dependencies |
| Support and improvements | Number of customers, pace of requests |
Payment fees can be read straight from public price lists. Stripe, for example, charges 1.5% + €0.25 per transaction for standard European Economic Area cards on its French pricing page, more for UK and international cards, and its pay-as-you-go subscription module adds 0.7% of the billing volume it handles. For a monthly plan, those fees apply to every single renewal.
LPR Studio publishes and operates two online products of its own, Izi-Devis and Tubissime, so every line in that table is one we pay ourselves each month.
Three mistakes that blow up a SaaS budget
Building billing in-house. Re-creating what payment providers already do, invoices and dunning included, is expensive and ages badly. Integrate a provider and keep the budget for your core feature.
Promising an integration to every prospect. Each connection promised during a sales call becomes a component you maintain for every customer. An integration earns its place in the product when several customers ask for it, not before.
Forgetting support. Early customers ask questions, lose passwords and pick the wrong plan. Without admin screens and help content, the founder answers every request by hand, and the product stalls while they do.
A market benchmark
For an order of magnitude, the B2B review platform Clutch reports on its software development pricing page, updated on 21 September 2026, an average project cost of $132,480 and a most common budget band of $10,000 to $49,999, across projects of every kind and every region. The two figures say different things: the $10,000 to $49,999 band is where the largest number of projects fall, while the $132,480 average, more than twice the top of that band, is pulled up by the heaviest projects. Neither is specific to SaaS and neither is a quote: the simpler your core feature and billing, the closer your platform sits to the common band, and the more complex they are, the closer it moves to the average.
Three ways to pay for the build
| Model | What you pay | What you get |
|---|---|---|
| Fixed price | One firm price, set before the first line of code | A finished, deployed product; the rights transferred are discussed when the price is set |
| Subscription | A monthly subscription, no development cost | Development, hosting, maintenance and updates; LPR Studio remains publisher and operator |
| SaaS product | Online access or a subscription | A product already published and operated by LPR Studio |
A fixed price needs cash upfront; a subscription spreads the cost over time. In every case the rights of each party are defined case by case in the contract. We compare both over three years in subscription or upfront build, and the three models are described on our offers page. If your product also needs to live on phones, see what a business mobile app costs.
Where to start
Describe the problem your future customers will pay to solve, and who those customers are. From there, LPR Studio presents a free visual prototype of the main journey (sign-up, core feature, billing) in a video call within 5 working days. That prototype is what makes a firm price possible, and you can stop at that point without owing anything.