Short answer: a professionally built first release of a B2B SaaS product most often lands between $40,000 and $150,000. A narrow single-workflow product from a lower-cost team can come in below that; a product with usage-based billing, several integrations and enterprise requirements, or almost any mid-sized scope quoted by an agency in a high-cost market, goes above it. The spread comes from two things you can estimate yourself: how many SaaS building blocks the first release needs, and the rate of the team building it.
About these numbers. Everything here is a planning estimate built from typical effort and typical market rates. It is not survey data and not a BBR price list. Use it to check whether a quote is plausible. A real quote needs a written scope.
Why SaaS costs more than the feature
Founders usually describe their product as its core feature: “scheduling for dental labs”, “contract review for property managers”. The quote covers a good deal more, because a product that many organisations pay for monthly needs machinery that a single-customer application does not:
- Every customer’s data kept separate from every other customer’s
- Teams, invitations and roles inside each customer account
- Plans, trials, upgrades, invoices and failed-payment handling
- A first-run experience that gets a trial user to a useful result
- An internal back office so you can support customers without a developer
- Monitoring, backups and email that reliably arrives
A useful rule of thumb: in a first SaaS release, the core workflow is often 40–50% of the engineering effort. The rest is the list above. Quotes that look surprisingly low have usually left some of it out.
The estimating method
As with any software, the arithmetic is:
Cost = effort (person-weeks) × blended weekly rate + contingency
The general method, including how rates differ by region and team type, is explained in our MVP development cost guide, and we will not repeat the rate table here. For the examples below we use two reference points: $50 per hour (a senior studio in Central or Eastern Europe or Türkiye, about $2,000 per person-week) and $150 per hour (a domestic US, UK or Australian agency, about $6,000 per person-week).
Effort by SaaS building block
These figures assume an experienced team, a conventional stack and a clean, standard interface. They cover backend and front end together.
| Building block | Basic version | Advanced version |
|---|---|---|
| Tenancy and workspace model | 1–2 person-weeks: shared database, tenant ID on every record, isolation tests | 3–6: schema or database per tenant, data residency, tenant-level configuration |
| Authentication and team management | 1.5–3: sign-up, verification, reset, invitations, workspace switching | +1–3 for SSO (SAML/OIDC), enforced MFA, directory provisioning |
| Roles and permissions | 0.5–1: two or three fixed roles | 3–6: custom roles, per-object permissions, approval chains |
| Subscription billing | 1.5–3: flat plans, trial, hosted checkout and billing portal, webhooks, plan limits | 4–8: per-seat proration, usage metering, multiple currencies, invoicing by bank transfer |
| Onboarding | 1–2: guided first-run, sample data, welcome emails | 3–6: data import from spreadsheets or a competitor’s export, with validation and error reporting |
| Core workflow | 4–8 for a focused workflow | 10–20+ for scheduling engines, rules-driven calculations, document generation, collaboration |
| Each third-party integration | 0.5–1.5: one-way, well-documented API | 2–4: two-way sync with conflict handling, OAuth, rate limits |
| Notifications and transactional email | 0.5–1 | 1.5–3: per-user preferences, digests, in-app notification centre |
| Internal admin / back office | 1–2: find a customer, view plan and usage, basic corrections | 3–5: impersonation with audit trail, feature flags, refunds, support tooling |
| Reporting and dashboards | 1–2: a few fixed charts, CSV export | 3–6: configurable reports, scheduled exports |
| Audit log and data export | 0.5–1 | 2–3: customer-visible log, retention settings, full account export |
| Public API for customers | Not in most first releases | 3–6: keys, rate limiting, versioning, documentation |
| Marketing site and legal pages | 0.5–1.5 | More with a CMS, pricing experiments, localisation |
| Interface design for the above | 2–4 | 5–8 with a custom design system |
| Infrastructure, CI/CD, monitoring, backups | 1–2 | 3–5 with staging parity, infrastructure as code, stricter security controls |
| Testing, QA, project management | Add 20–30% to the total. Not optional. | |
Two observations. The “advanced” column is where budgets disappear, and very little of it is needed to find your first ten customers. And the two blocks founders forget most often are the admin back office and data import, both of which directly affect whether you can support and activate the customers you win.
Three worked examples
1. Narrow vertical tool
A job-tracking product for small trade businesses. One workspace per company, owner and staff roles, flat monthly plans with a trial, a focused core workflow, email notifications, a basic admin panel, no integrations.
| Block | Person-weeks |
|---|---|
| Tenancy, auth, team management, roles | 4 |
| Billing (basic) | 2 |
| Onboarding (basic) | 1 |
| Core workflow | 6 |
| Notifications, admin, infrastructure | 3.5 |
| Design | 2.5 |
| Subtotal | 19 |
| Testing and project management (+25%) | about 5 |
| Total | about 24 |
At $50/hour that is roughly $48,000. At $150/hour, roughly $144,000. A founder who needs to go lower could drop in-app billing for the first cohort and invoice manually, saving two to three weeks.
2. B2B workflow product with integrations
A client-reporting product for agencies. Per-seat pricing, three roles plus a read-only client role, two integrations (an analytics source and an accounting system), spreadsheet import, scheduled PDF reports, a fuller admin area.
Foundations and billing with proration: 8. Onboarding with import: 4. Core workflow and report generation: 11. Two integrations: 5. Notifications, admin, reporting, audit log: 6. Design: 4. Infrastructure: 2. Subtotal 40; with testing and management, about 50 person-weeks. Roughly $100,000 at $50/hour; $300,000 at $150/hour. This is the kind of scope where phasing matters: launch with one integration and manual report scheduling and the first release drops to the mid-thirties.
3. Usage-billed product with an API and an AI feature
A document-processing product sold to mid-sized companies. Usage-based billing with metering, SSO for larger customers, a public API with keys and rate limits, a language-model extraction step with human review, audit log, and an admin area with usage visibility.
Foundations with SSO: 9. Usage billing and metering: 7. Core pipeline including the AI extraction and review interface: 16. Public API and documentation: 5. Admin, audit, reporting: 7. Onboarding: 3. Design: 5. Infrastructure and security controls: 4. Subtotal 56; with testing and management, about 70 person-weeks. Roughly $140,000 at $50/hour. The AI component also adds a per-request running cost, which we cover separately in what it costs to add AI features.
What pushes the cost up
- Usage-based and hybrid pricing. You must measure usage accurately, show it to the customer, report it to the billing provider and reconcile disputes.
- Enterprise buyers early. SSO, audit logs, security questionnaires, custom contracts and data-residency requests arrive together.
- Fine-grained permissions. They touch every query and every screen, and every combination needs testing.
- Two-way integrations. Keeping two systems in sync is several times the work of reading from one.
- Regulated data. Health, financial and children’s data add engineering controls and organisational compliance work.
- A mobile app at launch. For most B2B products a responsive web app is enough for the first release.
- Undefined pricing. If plans and limits are decided late, billing and enforcement get built twice.
Where SaaS founders overspend
- Custom roles and permission editors before any customer has asked for them
- A public API and webhooks with no integration partner waiting
- Microservices, Kubernetes and multi-region hosting for a product with no load
- Annual plans, coupons, referral credits and multiple currencies before the first monthly subscriber
- White-labelling and custom domains for customers who have not requested them
- A bespoke design system where a good component library would do
The test for each: would one of your first ten customers refuse to buy without it? If not, it waits. The sequencing is covered in how to build a SaaS product from idea to paying customers.
What it costs to run
Running costs for an early-stage SaaS product are small relative to the build. The figures below are rough planning ranges for a product with up to a few hundred customers; providers change their pricing, so check current terms.
| Item | Planning range | Notes |
|---|---|---|
| Application hosting and database | $50–$500 per month | Higher for data-heavy products or strict availability needs |
| Transactional email | $0–$100 per month | Scales with volume |
| Error tracking, logs, uptime monitoring | $0–$150 per month | Free tiers cover many early products |
| Managed authentication (if used) | Free tier to a few hundred dollars | Typically priced per active user; SSO features often cost extra |
| Payment and billing provider | A percentage of revenue plus a fixed fee per charge | Subscription, invoicing and tax features may add a further percentage |
| Merchant of record (if used) | A higher percentage of revenue | In exchange, the provider handles sales tax and VAT registration and remittance |
| File storage, backups, CDN | Usually under $50 per month at first | |
| AI model usage (if any) | Varies with volume | Billed per token; model it per request before launch |
| Domain, workspace tools, support inbox | $50–$200 per month |
The line that matters is none of these. It is continued development: bug fixes, dependency and security updates, and the features customers ask for. The technical choices that keep infrastructure costs low are discussed in our SaaS tech stack guide.
How to bring the number down without damaging the product
- Pick one customer segment and one workflow. Breadth is the most expensive thing in software.
- Start with flat or per-seat plans. Move to usage-based pricing once you understand usage.
- Use fixed roles. Owner, admin, member. Add granularity when a paying customer needs it.
- Buy the commodity parts. Hosted billing, managed or library-based auth, an email provider, a component library.
- Onboard the first customers by hand. A concierge import teaches you what the automated one must handle.
- Build the plain admin panel anyway. It is cheap and it saves developer time from the first week.
- Write the scope down. Uncertainty is priced as risk. A clear scope lowers quotes and prevents disputes.
If you would like BBR to estimate your product, our SaaS development page explains how we scope and price a first release.