A rigorous TCO analysis for Microsoft Power Platform in 2026, covering licensing, implementation, training, support, and the hidden costs most vendors don't mention. With real UK benchmarks and an ROI framework for board sign-off.
Most Power Platform business cases focus on the licence cost and a handful of automation savings. That is not a TCO analysis. It is a partial view that regularly leads to sticker shock six months into delivery. This guide provides the complete picture: every cost category, realistic UK benchmarks, and a financial model robust enough to withstand scrutiny from a CFO or procurement committee.
Why Most Power Platform Business Cases Fail at Board Level
The business cases that get rejected at board level almost always share the same flaw: they present the Microsoft list price for licensing and a single headline ROI figure, with no supporting workings. A credible business case must show the full cost base (not just licensing) alongside a conservative, bottom-up benefit calculation with named processes and measurable outcomes.
The Four Cost Categories Most Business Cases Miss:
- Internal resource time (maker training, governance, ongoing administration)
- Environment and Dataverse storage overages as the platform scales
- Premium connector licensing when integrations expand beyond the initial scope
- Support and managed service costs after the initial implementation partner engagement ends
Complete TCO Framework: All Seven Cost Categories
1. Microsoft Licensing Power Apps per-user (£16.40/user/month), Power Apps per-app (£3.70/app/user/month), Power Automate per-user (£12.30/user/month), Power Automate per-flow (£74/flow/month), Power BI Pro (£7.50/user/month). Audit your existing M365 estate before purchasing additional licences. UK benchmark: 50-user deployment, mixed Power Apps and Power Automate, £18,000–£36,000/year in Microsoft licences depending on plan mix.
2. Implementation and Development Professional Power Platform development in the UK runs at £600–£900/day for experienced developers, £450–£650/day for mid-level, and £1,200–£1,800/day for solution architects on complex Dataverse or integration work. UK benchmark: a medium-complexity Power Apps + Power Automate project, £25,000–£75,000 depending on scope, integrations, and data complexity.
3. Training and Adoption Adoption is consistently the most underinvested area. A deployment without a maker journey, champion programme, and end-user training will see utilisation plateau at 30–40% of potential within six months. UK benchmark: £4,000–£12,000 for a 50–200 user deployment depending on the number of custom applications and the maturity of the internal IT team.
4. Dataverse and Storage Dataverse storage is frequently the hidden cost that inflates year-two spend. Each Power Apps per-user licence includes 250MB of database storage and 2GB of file storage. Additional capacity costs £33/GB/month for database. UK benchmark: organisations with high-volume processes (1000+ daily records) should budget an additional £2,000–£8,000/year for storage overages.
5. Ongoing Support and Maintenance The platform evolves with two major Microsoft release waves per year (April and October). Without an active managed service, organisations accumulate technical debt as connectors change and deprecated features create broken flows. UK benchmark: managed service retainer for a medium-complexity deployment, £1,500–£4,000/month depending on scope and SLA.
6. Governance and Administration The Centre of Excellence starter kit, DLP policy management, environment lifecycle governance, and licence assignment all require ongoing internal resource. UK benchmark: 0.2–0.5 FTE of an IT administrator's time for a 50–200 user deployment, rising to 0.5–1.0 FTE at 500+ users.
7. Integration and Security Premium connectors, on-premises data gateway licensing, Azure infrastructure for advanced scenarios, and penetration testing for regulated deployments. UK benchmark: additional £3,000–£15,000/year for organisations with more than 3–4 system integrations or regulated data handling requirements.
Year-One vs Year-Three TCO: The Scaling Effect
| Cost Category | Year 1 | Year 2 | Year 3 |
|---|---|---|---|
| Microsoft Licensing | £22,000 | £24,000 | £28,000 |
| Implementation / Development | £55,000 | £18,000 | £12,000 |
| Training & Adoption | £8,000 | £3,000 | £2,000 |
| Storage & Overages | £1,500 | £3,500 | £6,000 |
| Managed Service / Support | £24,000 | £30,000 | £30,000 |
| Governance & Admin (internal) | £12,000 | £12,000 | £14,000 |
| Integration & Security | £8,000 | £4,000 | £4,000 |
| Total | £130,500 | £94,500 | £96,000 |
Illustrative figures for a 75-user, medium-complexity deployment with 3 Power Apps, 12 Power Automate flows, and Power BI reporting.
Building the Benefit Side: A Bottom-Up Approach
For each process being automated, calculate: how many times it runs per year, how long it currently takes per run, what the fully-loaded cost of that time is (UK median knowledge worker cost: £28–£45/hour depending on seniority and sector), and what percentage automation will realistically save.
- Invoice processing automation: 4–8 minutes per invoice → 45 seconds average with Power Automate. At 2,000 invoices/month and £32/hour fully-loaded cost: £38,000–£76,000/year saving
- Employee onboarding workflow: 12–18 manual touchpoints → 3–4 automated. At 100 starters/year and 45 minutes saved per touchpoint: £15,000–£22,000/year saving
- Management reporting pack: 2 days/month of analyst time → 2 hours with Power BI automated refresh. At £350/day: £33,600/year saving
- Compliance evidence collection: 6 hours/quarter per business unit → 30 minutes automated. At 8 units and £38/hour: £13,680/year saving
The Board-Ready Summary: Three Numbers That Matter
- Payback period: For well-scoped mid-market deployments in the UK, the typical payback period is 9–18 months. Below 12 months is strong; above 24 months requires strategic justification.
- 3-year NPV: Using a 10% discount rate and conservative benefit estimates, a well-structured Power Platform deployment typically delivers £150,000–£600,000 3-year NPV for a 50–200 user organisation.
- Risk-adjusted ROI: Discount your benefit projections by 30% to account for adoption risk and scope creep. If the business case still stacks up after this haircut, it is robust enough to withstand finance scrutiny.
