PSR Labs Ltd · Evidence

What can be proved today, and how every result will be.

PSR Labs Ltd has no completed client engagements yet, so this page has no case studies or testimonials. Instead it sets out what you can check for yourself now, a worked example of the method, and the standard every future result will be published to, including results that miss.

Track record

Every engagement is listed here from the day it starts, and stays listed whatever the outcome.

Track record: every engagement, its status and measured result
No.	Practice	Engagement	Status	Measured result
1	A sole practice owned by a member of the director’s family	Review	Not yet started	—

Last updated 28 September 2026. Completed engagements: 0.

The standard every case study will meet

Baseline first. Profit, lock-up, recurring share and the other levers are measured from the practice’s own records before any change is made.
Every action listed, including those the practice chose not to make.
Result measured the same way, using the definitions on the Programme page, from invoices, agreements and contracts, not estimates.
Checked by the client. The practice owner confirms the figures in writing before anything is published.
Published whatever the outcome, anonymised unless the practice agrees to be named, with the guarantee refund stated if one was paid.

Worked example

This is a hypothetical practice, not a client. It shows how the diagnostic and the review turn a practice’s figures into pounds, using the same formulas and assumptions as the free diagnostic.

The practice’s figures

Annual fees: £650,000
People: 8
Last fee rise: 2 years ago
Debtor days: 45
WIP days: 40
Recurring share: 55%
Clients lost a year: 7.5%

What the numbers say

Fee drift: £650,000 × 3% × 2 = £39,000 a year
Cash in lock-up: £650,000 × 85 ÷ 365 = £151,400
Fees lost to churn: £650,000 × 7.5% = £48,750 a year
Indicative value: 0.8–1.2 × £357,500 recurring = £286,000–£429,000
At 75% recurring: £390,000–£585,000

Assumptions: fees drift about 3% a year behind costs when not raised; lock-up is debtor days plus WIP days; value uses 0.8× to 1.2× recurring fees, a range commonly quoted for small UK practice sales. Real offers depend on profit, retention, location and owner dependence. A review replaces these assumptions with the practice’s own records.

Check it yourself

PSR Labs Ltd at Companies HouseCompany number 17468165, incorporated 2026. View the record.
PSR Capital Enterprises Ltd at Companies HouseCompany number 17455623, the parent company. View the record.
ICO registrationPSR Labs Ltd is registered as a data controller, reference ZC256581. Search the register.
The method, in the openThe diagnostic shows every formula and assumption it uses. The Programme definitions set out exactly how a result is measured.
The directorParambir Randhawa: CertHE Mathematics, University of Leeds; independent research across mathematics, AI, economics and property. About · Code on GitHub · LinkedIn.
Making Tax Digital datesThresholds and start dates are HMRC’s. GOV.UK guidance.

Why the risk sits with PSR Labs

Without case studies, the guarantee does the work that proof would otherwise do. If the measured annual profit improvement is below twice the fee, the shortfall is refunded, up to the fees paid. The conditions and definitions are on the Programme page.

References: once the first engagement is complete, you can ask to speak to that client before you commit, subject to their agreement.

Take the free diagnostic See the Programme →