CUSTOM SAAS DEVELOPMENT

UK SaaS founders who build their product without a GDPR-compliant data model, without ICO registration, and without a right-to-erasure workflow will face the compliance work as a retrofit project during their first enterprise sales cycle: a cost and timeline that could have been avoided at MVP stage.

Build your UK SaaS product with GDPR architecture, ICO registration guidance, FCA perimeter awareness, and Stripe UK tax configuration built into the foundation — not bolted on after the first enterprise prospect asks for your Data Processing Agreement.

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This is for you if

Who This Is For

If you are building a SaaS product that connects to HMRC's Making Tax Digital API, processes VAT returns, or integrates with open banking providers under the UK's Open Banking Standard, the compliance and technical architecture requirements are specific to the UK regulatory environment. MTD-compatible SaaS products need HMRC API Gateway credentials, VAT return submission capability, and a data model that stores VAT period data with the correct retention period. Ignited Nepal builds these products with HMRC API integration handled at the architecture stage.

Law firms operating under SRA oversight and financial services businesses operating under FCA authorisation have client data handling obligations that must be reflected in the SaaS products they adopt. If you are building document automation, compliance monitoring, or case management SaaS for this audience, your product needs to demonstrate GDPR compliance, appropriate data segregation, and audit logging before a regulated firm will sign a contract. These are not post-launch additions; they are features that enterprise legaltech and regtech buyers require at the pilot stage.

The UK property market operates through a combination of regulated agents, Land Registry data, and third-party portals including Rightmove and Zoopla. A SaaS product targeting lettings agents or conveyancers needs to integrate with these data sources, handle personal data of tenants and buyers under UK GDPR, and support the workflow patterns specific to UK property transactions. Ignited Nepal has built proptech products that integrate with Land Registry data and property portals and understands the data model requirements specific to UK property SaaS.

Accountants, HR consultants, recruiters, and management consultants who deliver the same structured workflow to every client are well-positioned to turn that workflow into a SaaS product. The repeatable core of a professional services firm — the intake process, the delivery workflow, the reporting output — can become a product that scales without adding proportional headcount. The challenge is separating what the product should do from what the bespoke client work includes, and scoping the MVP tightly enough that it ships in weeks rather than quarters. Ignited Nepal runs structured product scoping sessions designed for this transition.

What's broken

What Is Broken

GDPR-compliant data model not designed from the start

UK SaaS products built without GDPR architecture from day one have no consent management, no data deletion capability, no right-to-access export, and no data retention policy enforced at the database level. When the first enterprise prospect requests a Data Processing Agreement or sends a supplier due diligence questionnaire, the founder discovers that the architecture does not support the compliance claims they are being asked to make. Retrofitting GDPR into a live SaaS product requires schema changes, audit log additions, and a full data mapping exercise that typically takes 4 to 8 engineering weeks. Building the compliant data model from MVP stage takes 2 to 3 days. The problem is not the complexity of GDPR compliance; the problem is that it is treated as a project for later rather than an architectural constraint from the start.

ICO registration overlooked

UK SaaS companies processing personal data of UK data subjects without ICO registration are in breach of their legal obligations under the UK GDPR and the Data Protection Act 2018. ICO registration is required for any organisation that determines the purposes and means of processing personal data, and the annual registration fee ranges from £40 to £2,900 depending on the size and turnover of the organisation. Most SaaS founders are required to register; the only exemptions are narrow and specific. Operating without registration is not a minor oversight; it is an ongoing regulatory breach that can result in enforcement action if a data subject complaint triggers an ICO investigation. Registration takes 20 minutes online. Not knowing it is required is the only reason it gets missed.

FCA perimeter analysis not done for financial services SaaS

UK SaaS products that process payments, extend credit, facilitate investment, or provide insurance-related functionality may fall within the FCA's regulatory perimeter without the founder intending them to. A SaaS product that facilitates lending between businesses, provides financial advice as part of its workflow, or holds client money as a product feature is subject to FCA authorisation requirements unless a specific exemption applies. Building a product that inadvertently constitutes regulated activity without authorisation is an enforcement risk that can result in the product being required to cease the regulated activity. FCA perimeter analysis costs a small fraction of the enforcement risk and should be completed before product architecture is finalised, not after the first customer complaint or FCA enquiry.

Stripe UK VAT not configured for B2B and B2C customers

UK SaaS companies using Stripe without correct VAT configuration are collecting incorrect amounts from customers and creating HMRC tax assessment risk. UK VAT at 20% applies to SaaS sales to UK consumer (B2C) customers. B2B sales to UK business customers with a valid VAT number follow the UK standard; B2B sales to EU business customers after Brexit follow the reverse charge mechanism, meaning the customer accounts for VAT rather than the supplier. Stripe Tax handles UK and EU VAT correctly when configured with the right tax settings and the customer's tax status recorded accurately. Not configuring this correctly does not make the VAT liability disappear; it makes it a liability that accumulates until an HMRC review or a customer requests a corrected invoice.

What we engineer

What We Do

Product scoping with GDPR and FCA constraints built in

Every UK SaaS engagement at Ignited Nepal begins with a structured product scoping session that treats GDPR data architecture and FCA perimeter analysis as constraints, not afterthoughts. The scoping session defines the MVP feature set, the data model with tenant isolation and right-to-erasure capability, the ICO registration status, and the billing configuration. The output is a feature list with acceptance criteria, a technical architecture document, and a compliance baseline that the product meets from the first deployment. Nothing goes into a sprint that has not passed through scoping.

GDPR data model and privacy-by-design architecture

Ignited Nepal designs the database schema for UK SaaS products with GDPR compliance as a first-class requirement. This means a consent management layer for products that require consent-based processing, a right-to-erasure implementation that cascades correctly across all tables that hold personal data, a data retention policy enforced at the database level through scheduled deletion jobs, and an audit log for access and modification of personal data. A data processing register is produced as part of the architecture documentation and maintained as the product evolves. This is not a bolt-on compliance feature; it is the data model.

Authentication, roles, and UK enterprise identity requirements

User authentication for UK SaaS products is implemented with the access patterns of UK enterprise buyers in mind. UK professional services and financial services firms commonly require SAML-based SSO integration with their existing identity provider (Microsoft Azure AD is the most common in the UK enterprise market). Role-based access control is scoped in the product scoping session and implemented in a way that supports the permission structures UK enterprise buyers will require during their supplier onboarding process. Password policy, session management, and two-factor authentication are included in the standard authentication implementation.

Stripe UK billing with UK VAT and EU reverse charge

Stripe is the default billing platform for UK SaaS products built by Ignited Nepal. Stripe Tax is configured from the start with UK VAT at 20% for domestic B2C sales, the UK B2B tax status for UK business customers, and the EU reverse charge mechanism for EU business customers post-Brexit. Subscription plan structures, trial periods, usage-based billing where applicable, and dunning sequences for failed payments are configured in Stripe Billing and tested against real Stripe test-mode scenarios before the first paying customer is onboarded. The billing configuration is documented so the founding team can manage it without engineering support for standard operations.

Cloud deployment on AWS UK or Azure UK with UK data residency

Production deployment for UK SaaS products is on AWS eu-west-2 (London) or Microsoft Azure UK South depending on the product's data residency requirements. UK data residency is the default for products handling personal data of UK data subjects. A CI/CD pipeline is configured from day one: main branch pushes deploy to staging, release tags deploy to production, and the pipeline includes automated tests, code quality checks, and deployment notifications. Database backups, monitoring, and alerting are configured before the product is made available to external users.

Post-launch iteration and enterprise sales support

Ignited Nepal provides post-launch sprint-based iteration support for UK SaaS products through the first enterprise sales cycle. This covers bug fixes from user testing, feature additions from the post-MVP backlog, and the technical documentation that enterprise prospects commonly request during supplier assessment: architecture diagrams, data flow documentation, penetration testing coordination, and security policy templates. The first enterprise sale is often the hardest because the product's compliance and security posture has not yet been tested by an enterprise procurement process. Ignited Nepal has supported UK founders through that process.

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What changes

What Changes

Before
After
Before UK SaaS products built without GDPR architecture from day one have no consent management, no data deletion capability, no right-to-access export, and no data retention policy enforced at the database level. When the first enterprise prospect requests a Data Processing Agreement or sends a supplier due diligence questionnaire, the founder discovers that the architecture does not support the compliance claims they are being asked to make. Retrofitting GDPR into a live SaaS product requires schema changes, audit log additions, and a full data mapping exercise that typically takes 4 to 8 engineering weeks. Building the compliant data model from MVP stage takes 2 to 3 days. The problem is not the complexity of GDPR compliance; the problem is that it is treated as a project for later rather than an architectural constraint from the start.
After A right-to-erasure workflow, consent management layer, and data retention enforcement built into the schema from day one takes 2 to 3 days of architecture work. The same work as a retrofit on a live product with paying customers and a production database typically takes 4 to 8 engineering weeks and carries migration risk. The cost difference is not marginal.
Before UK SaaS companies processing personal data of UK data subjects without ICO registration are in breach of their legal obligations under the UK GDPR and the Data Protection Act 2018. ICO registration is required for any organisation that determines the purposes and means of processing personal data, and the annual registration fee ranges from £40 to £2,900 depending on the size and turnover of the organisation. Most SaaS founders are required to register; the only exemptions are narrow and specific. Operating without registration is not a minor oversight; it is an ongoing regulatory breach that can result in enforcement action if a data subject complaint triggers an ICO investigation. Registration takes 20 minutes online. Not knowing it is required is the only reason it gets missed.
After ICO registration is a 20-minute process once you know it is required and have the organisation details ready. UK SaaS companies that complete registration before going live are not exposed to the enforcement risk that comes from operating without it, and they can answer the "Are you ICO registered?" question on enterprise supplier questionnaires with a registration number rather than a gap.
Before UK SaaS products that process payments, extend credit, facilitate investment, or provide insurance-related functionality may fall within the FCA's regulatory perimeter without the founder intending them to. A SaaS product that facilitates lending between businesses, provides financial advice as part of its workflow, or holds client money as a product feature is subject to FCA authorisation requirements unless a specific exemption applies. Building a product that inadvertently constitutes regulated activity without authorisation is an enforcement risk that can result in the product being required to cease the regulated activity. FCA perimeter analysis costs a small fraction of the enforcement risk and should be completed before product architecture is finalised, not after the first customer complaint or FCA enquiry.
After A SaaS product that has completed an FCA perimeter analysis before the first sprint can build with confidence that it knows which regulatory category it is in. Products that skip this step and later discover they are conducting regulated activity face the cost and timeline of restructuring the product or obtaining authorisation under commercial pressure.
Before UK SaaS companies using Stripe without correct VAT configuration are collecting incorrect amounts from customers and creating HMRC tax assessment risk. UK VAT at 20% applies to SaaS sales to UK consumer (B2C) customers. B2B sales to UK business customers with a valid VAT number follow the UK standard; B2B sales to EU business customers after Brexit follow the reverse charge mechanism, meaning the customer accounts for VAT rather than the supplier. Stripe Tax handles UK and EU VAT correctly when configured with the right tax settings and the customer's tax status recorded accurately. Not configuring this correctly does not make the VAT liability disappear; it makes it a liability that accumulates until an HMRC review or a customer requests a corrected invoice.
After UK B2C VAT, UK B2B tax status, and EU reverse charge set up correctly in Stripe Tax from the start means every invoice is correct from the first customer. There are no accumulated incorrect invoices to credit-note, no HMRC assessment exposure from systematic under- or over-collection, and no manual tax calculation process running alongside the billing system.
How it works

Process

  1. 01

    SaaS Scoping Session

    A structured session covering the product's target user, core job to be done, MVP feature set, GDPR data requirements, ICO registration status, and FCA perimeter position. The output is a written scope document with acceptance criteria for each MVP feature.

  2. 02

    Data Model and Architecture Design

    The database schema is designed with multi-tenancy, right-to-erasure, data retention policy, and audit logging built in. The architecture document covers infrastructure, deployment environment, authentication approach, and billing platform configuration.

  3. 03

    Authentication and Billing Integration

    User authentication, role-based access control, and Stripe UK billing with correct UK VAT and EU reverse charge configuration are implemented and tested before the core product features are built. These are infrastructure components, not features to add at the end.

  4. 04

    MVP Build and Staged Deployment

    The MVP feature set is built sprint by sprint against the acceptance criteria from the scoping session. A staging environment is live from the first sprint. Enterprise-facing features — DPA template, security documentation, audit log access — are included in the MVP scope.

  5. 05

    Production Deployment and CI/CD

    Production deployment on AWS eu-west-2 or Azure UK South with a CI/CD pipeline, database backups, monitoring, and alerting configured. The product is handed over with documented operational procedures and a post-launch support plan.

  6. 06

    Post-Launch Iteration and Enterprise Sales Support

    Sprint-based iteration support through the first enterprise sales cycle, covering feature additions from the post-MVP backlog, technical documentation for enterprise procurement, and compliance evidence preparation for supplier assessments.

Request a SaaS Scoping Session →
Common questions

Frequently asked questions about Custom SaaS Development

What GDPR requirements must be built into a UK SaaS product's data model from the start?

A UK SaaS product's data model must support six specific GDPR requirements from day one: a consent management mechanism for any processing based on consent, a right-to-erasure implementation that deletes or anonymises all personal data for a given data subject on request, a right-to-access export that produces a machine-readable copy of all personal data held for a data subject, a data retention policy enforced at the database level, an audit log for access and modification of personal data, and a data processing register mapping every personal data field to its processing purpose and legal basis. These are not standalone features; they are architectural properties of the data model. Building them in at MVP stage takes 2 to 3 days. Retrofitting them into a live product typically takes 4 to 8 engineering weeks.

Does my UK SaaS company need to register with the ICO and how do I do it?

ICO registration is required for any UK organisation that determines the purposes and means of processing personal data, and almost every SaaS company is required to register. The registration fee is £40 per year for micro organisations, £60 for small organisations, and up to £2,900 for large organisations, based on turnover and headcount thresholds published by the ICO. Registration is completed online at the ICO website (ico.org.uk/registration) and takes approximately 20 minutes once you have the organisation's details, the name of your Data Protection Officer or responsible person, and a description of your processing activities. Registration must be renewed annually. Operating without registration when required is a breach of the UK GDPR and the Data Protection Act 2018.

How do I know if my UK SaaS product requires FCA authorisation?

A UK SaaS product requires FCA authorisation if it carries out a regulated activity as defined in the Financial Services and Markets Act 2000 (Regulated Activities) Order 2001. Regulated activities include accepting deposits, dealing in investments, arranging credit, providing financial advice, and operating a payment institution, among others. The FCA publishes a regulatory perimeter guidance document that sets out how the boundary applies to technology products. A SaaS product that facilitates lending, holds client money as a product feature, or provides personalised financial recommendations as part of its workflow is likely to require authorisation or a specific exemption. FCA perimeter analysis should be conducted by a UK financial regulation solicitor or compliance consultant before the product architecture is finalised. Building a product that inadvertently conducts regulated activity without authorisation is an enforcement risk with significant consequences.

How do I configure Stripe UK for correct UK VAT on B2C sales and B2B reverse charge for EU customers?

Stripe Tax, when activated on a UK Stripe account, handles UK VAT automatically for sales to UK customers when you set the product tax code correctly and record the customer's tax status. For UK B2C customers, Stripe collects VAT at 20% and remits it on your behalf when you are VAT-registered. For UK B2B customers with a valid UK VAT number, the supply is zero-rated for VAT purposes and the customer self-accounts. For EU B2B customers post-Brexit, the reverse charge mechanism applies: the UK supplier does not charge VAT and the EU business customer accounts for VAT in their own country. Stripe Tax handles this when you record the customer as a business, collect their EU VAT number, and set the tax behaviour on your price objects to exclusive. You must be UK VAT-registered to collect and remit UK VAT through Stripe; the VAT registration threshold in the UK is currently £90,000 annual taxable turnover.

What does it cost and how long does it take to build a UK SaaS MVP?

A UK SaaS MVP built by Ignited Nepal typically takes 8 to 16 weeks from the completion of the scoping session to a production-deployed product available to paying customers. The timeline depends on the complexity of the core feature set, the number of third-party integrations required (HMRC API, open banking, property data sources, and so on), and whether the product requires enterprise-grade authentication such as SAML SSO. The cost for an 8-week MVP engagement ranges from £18,000 to £35,000 depending on scope; a 16-week engagement with a more complex feature set and third-party integrations ranges from £35,000 to £65,000. These figures include scoping, architecture design, full-stack build, Stripe billing integration, GDPR data model, CI/CD pipeline, and a post-launch support period.

Our team

The people behind the work

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Niraj Raut

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Keshab Joshi

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Arogya Rijal

SaaS SEO Expert
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Closing CTA

UK SaaS founders who are planning their product or are early in development and want to get the GDPR data model, ICO registration, FCA perimeter position, and Stripe UK billing configuration right from the start can book a SaaS scoping session with the Ignited Nepal UK team. The scoping session is a structured 90-minute call that produces a written architecture brief, a compliance baseline, and a cost and timeline estimate for your MVP. There is no commitment required beyond the session itself.

Request a SaaS Scoping Session →