The verdict in three sentences
A B2B SaaS MVP that can be sold to its first 10 customers costs EUR 35,000 to 80,000 in 2026 (about GBP 30,000 to 68,000) for a Manchester startup, delivered in 10 to 14 weeks. That budget covers authentication, simple multi-tenancy, Stripe billing, a dashboard and the core feature, nothing more. After launch, plan GBP 130 to 510 a month in running costs: the real risk is not the build cost, it is a scope so wide that first sales are delayed.
What a sellable MVP really contains
Pre-seed founders often confuse an MVP with a complete version 1. A B2B MVP must let a customer sign up, pay, use the feature that solves their problem and invite a colleague. Everything else waits for feedback from the first customers.
| Building block | In the MVP | Estimated days | Indicative cost (GBP, day rate 550) |
|---|---|---|---|
| Authentication, invitations, simple roles | Yes | 6 to 9 | 3,300 to 4,950 |
| Multi-tenancy (one organisation = one workspace) | Yes | 5 to 8 | 2,750 to 4,400 |
| Core feature (the problem solved) | Yes | 25 to 45 | 13,750 to 24,750 |
| Stripe billing (subscriptions, trial, invoices) | Yes | 5 to 8 | 2,750 to 4,400 |
| Dashboard and key metrics | Yes | 6 to 10 | 3,300 to 5,500 |
| UX/UI and light design system | Yes | 8 to 14 | 4,400 to 7,700 |
| Infrastructure, CI/CD, GDPR, monitoring | Yes | 5 to 8 | 2,750 to 4,400 |
| Enterprise SSO, public API, mobile app | No, V2 | 20 to 40 | 11,000 to 22,000 |
In total, 60 to 102 days, roughly GBP 33,000 to 56,000 at GBP 550 a day, plus scoping and project management.
Agency, freelancer or CTO: comparing the options
The production model matters as much as the scope. In Manchester, the 2026 market offers three realistic options for a non-technical founder.
| Option | Day rate or cost | 12-week MVP budget | Main risk |
|---|---|---|---|
| Agency or product studio | GBP 470 to 640/day | GBP 38,000 to 68,000 | Higher cost, but a full team |
| Senior freelancer alone | GBP 380 to 550/day | GBP 25,000 to 47,000 | Single-person dependency, no design |
| Freelance team coordinated by the founder | GBP 380 to 550/day | GBP 30,000 to 51,000 | Time-consuming coordination |
| Co-founder CTO (salary + equity) | GBP 65,000 to 85,000/year | GBP 16,000 to 21,000 over 3 months | Slow hiring, 3 to 6 months |
| Fixed-price studio | Fixed fee | GBP 30,000 to 60,000 | Scope changes billed extra |
A fixed price is often the healthiest choice at pre-seed: it forces a frozen scope, and the founder knows the exact spend before raising or drawing on a startup loan.
Scope cuts that save 20 to 40%
Every feature removed from the MVP saves time and money. Here are the cuts we recommend most often, and the monthly running cost that follows launch.
| Trade-off | Saving | Related monthly running cost |
|---|---|---|
| Stripe Checkout instead of a custom payment flow | GBP 2,500 to 4,300 | Stripe fee 1.5% + 20p (UK cards) |
| Back office via an admin tool instead of a custom UI | GBP 3,400 to 6,800 | GBP 0 to 45 |
| Transactional email through a third-party service | GBP 1,300 to 2,500 | GBP 13 to 70 |
| One language at launch | GBP 1,700 to 3,400 | GBP 0 |
| Managed hosting (Vercel, Render, Heroku) | GBP 1,700 to 3,400 of DevOps | GBP 45 to 260 |
| Managed database | Included | GBP 20 to 130 |
With monitoring, backups and domains, running an MVP stays between GBP 130 and 510 a month up to a few hundred users.
Mini case study
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Emma, founder in Manchester of a quality audit SaaS for food manufacturers, has GBP 51,000 (startup loan and friends and family). Her first spec, with a mobile app and SSO, is quoted at GBP 78,000. She drops mobile and SSO and switches to Stripe Checkout and an admin tool: the fixed price falls to GBP 46,000 for 12 weeks.
She keeps GBP 5,000 for 10 months of running costs at GBP 300 a month (GBP 3,000) plus a fixes buffer. With 10 customers at GBP 250 a month, she reaches GBP 2,500 of monthly recurring revenue in month 5 after launch, enough of a signal to approach a seed round.
FAQ
Can a SaaS MVP be built for under GBP 25,000?
Yes with no-code (Bubble, Softr) or a very narrow scope, for GBP 8,500 to 21,000. Rebuilding in custom code later often costs 1.5 to 2 times the original price.
Who owns the source code?
The contract must assign IP to the client on delivery, with code pushed to your own Git repository. This is non-negotiable for future investor due diligence.
Is multi-tenancy essential from the MVP?
Yes in B2B, because each customer must only see their own data. Simple per-organisation multi-tenancy takes 5 to 8 days, versus 3 to 4 times more if retrofitted later.
What does maintenance cost after launch?
Allow 10 to 20% of the initial budget per year for corrective maintenance and updates. New features are budgeted separately, usually in 2-week sprints.
Can public funding cover part of the MVP?
Innovate UK Smart grants and SEIS investment can help, with SEIS letting angels invest up to GBP 250,000 in the company with tax relief. Allow 1 to 3 months for processing in your plan.
Let's scope your project. Describe your core feature and your first 10 target customers, and we will propose a fixed-price MVP scope with an indicative budget, running costs and a 12-week plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
