Custom ATS for a Recruitment Consultancy in London (2026): Cost, Comparison and Data Retention

The verdict in three sentences

For a London recruitment and executive search consultancy with 10 to 30 consultants and 40,000 candidates on file, an off-the-shelf ATS costs EUR 60 to 150 per user per month (roughly GBP 50 to 130), or EUR 7,200 to 54,000 a year depending on headcount. A custom ATS priced at EUR 35,000 to 90,000 pays for itself once AI matching and a client portal save half a day per assignment. Automatic data purging after 2 years is not optional: under UK GDPR it is what protects the firm if the ICO comes calling.

Off-the-shelf vs custom ATS: the 2026 comparison

SaaS tools handle standard applicant tracking well. They struggle with executive search: weak boolean search on an aging database, a generic client portal, no retained-assignment logic and no fee reporting.

AI parsing is cheap: 6,000 CVs a year at EUR 0.06 comes to EUR 360. The real cost is consultant time spent re-qualifying badly indexed profiles.

Shortlist time and 4-year total cost

The main gain of an ATS built for search work is shortlist speed. On a 40,000-profile database, a matching engine that weighs sectors, salary bands and interview history avoids re-reading 200 records per assignment.

Total cost of ownership over 4 years for 20 consultants (2026 order of magnitude):

From 15 consultants upwards, custom is usually cheaper over 4 years, before counting the time saved.

Data retention: what the ATS must do on its own

UK and EU regulators expect candidate records to be kept no longer than necessary, typically 2 years after last contact, unless consent is renewed. The ATS should timestamp every interaction, send a renewal request 30 days before expiry, anonymise or delete non-renewed profiles and log subject access requests. Add a record of processing activities, UK or EU hosting and a per-consultant access log. These features account for 10 to 15 % of the development budget.

Mini case study

Claire, partner at an 18-consultant executive search firm in Mayfair, runs 140 assignments a year. With her current ATS, each assignment takes 19 h of search and follow-up. A custom build cuts that to 8 h: 11 h saved x 140 assignments = 1,540 hours a year. At a fully loaded EUR 70 per hour, that is EUR 107,800 of freed capacity every year for a EUR 60,000 project. Payback comes in under 7 months.

FAQ

How much does a custom ATS cost a recruitment firm in 2026?

Budget EUR 35,000 for a core (candidate database, pipeline, retention purge) and up to EUR 90,000 with AI matching, client portal and fee invoicing. Maintenance then runs EUR 300 to 900 a month.

Can we migrate the 40,000 candidates from our old ATS?

Yes, via CSV or API export, with deduplication and CV re-indexing. Migration takes 2 to 4 weeks, and profiles without valid consent under 2 years old are isolated at import.

Is AI matching reliable?

It sorts, it does not decide. On a well-structured database, it puts a relevant profile in the top 20 results in 80 to 90 % of searches, cutting search time by about 70 %.

What does CV parsing cost?

Between EUR 0.02 and 0.10 per CV depending on the model. For 6,000 CVs a year the budget stays under EUR 600.

How long does it take?

4 to 6 months: 3 weeks of scoping, 3 to 4 months of development and 3 weeks of acceptance testing with two pilot consultants.

Let's scope your project. Send us your consultant headcount, database size and current tools, and we will price a custom ATS between EUR 35,000 and 90,000 with a 4 to 6 month plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.