Basel 3.1 readiness guide
A practitioner's guide to Basel 3.1 in the UK: what applies on 1 January 2027, what to have ready and what the PRA will look for. Free to read.
By Mark Dougherty, CPA (CAN)RisKIT · Prudential models · Implementation
RisKIT implementation and support is the service around every RisKIT model: our practitioners configure the model to your balance sheet, load it with your data, train the people who will own it and support them after go-live. It is for risk, finance and treasury teams at banks, building societies, investment firms and payment institutions, in the UK and wherever else they are regulated.
You buy a working capability rather than a file: a first run reconciled to your own figures, and a team that can repeat it next quarter without us.
By Mark Dougherty, CPA (CAN)Updated
Implementation
Four steps, for a capital, liquidity or recovery model alike.
We take the model through your balance sheet: which exposure classes, currencies, buffers and scenarios apply to you, and where each input will come from. Fit and timetable are confirmed here.
Framework options, the capital or liquidity base, scenario parameters and the assumptions register are set to your firm, with each choice recorded in the change log for your reviewers.
Your team loads a period you have already reported and we reconcile the output to the return you filed. Where they differ, the cause is usually classification, and it is settled before anyone projects from the model.
The people who will run the model are trained on it, and it is handed over with its user manual and documented assumptions.
What to prepare
Data your finance and treasury teams already produce; the model is a workbook, so there is nothing to install or integrate.
The last item is the one most often missed: when the capital base, the loan tape and the maturity ladder each arrive at their own date, the first run reconciles to nothing.
Training
Training is for the people who will run the model next year, as well as those who sign it off this year: the input sheets, the assumptions register and its change log, how each scenario is run and how the outputs are read, so your team can produce the board pack without us.
We teach the reconciliation as well as the run, because the first question a validator, an auditor or your supervisor asks of an output is how it ties to the last return. Training on the framework behind the numbers, for the board or the wider team, comes from Risk Education.
Support
Remote support for set-up, data entry, early use and interpretation queries comes with every model, and it covers handover when your team changes.
Keep an unmodified master copy and log every change in the assumptions register, so a difference you report can be compared with the model as delivered. Full terms: the licence section of the RisKIT page.
Where we work
Wherever your firm is regulated. We are based in London, work with firms in the UK and worldwide, and support you remotely over a shared screen.
The models follow the PRA’s Basel 3.1 rules, EU CRR III, the US Basel III Endgame and the global Basel standards, and where a regulator applies a mix, we build a hybrid. Each regulator sets its own implementation dates, so configuration starts by fixing which rules, and which date, your model follows.
Regulatory timetable
Basel 3.1 and the SDDT capital regime apply
For UK banks and building societies the date that sets the plan is 1 January 2027, when the PRA’s Basel 3.1 rules in PS1/26 (published 20 January 2026) and the SDDT capital regime in PS4/26 take effect, and Basel 3.1 reporting starts. A firm moving to models 500 to 502 wants its first reconciled run before then, so the first return under the new rules is not also the first test of the model.
One item belongs in the data preparation: the PRA expects every existing real estate exposure to have been assessed by 1 January 2027 for whether repayment depends materially on the property’s cash flows, so the loan tape needs that flag before the first run. More on Basel 3.1.
Sources: Bank of England, PS1/26 Implementation of Basel 3.1: final rules, 20 January 2026, paras 1.23, 1.26 and 2.6; PS4/26 The Strong and Simple Framework, 20 January 2026, para 1.15.
FAQ
Typically weeks rather than months from walkthrough to implementation. Data readiness sets the timetable more than the model does: a reported period to reconcile against, one cut-off date and a named owner shorten it.
Yes. Where your team is short of time or skills, our practitioners do the set-up and any tailoring on a focused, time-boxed basis under a separate agreement. Governance stays with your firm, so training and handover happen either way.
Your firm, as with any internal model. It goes into your model inventory and through your model risk governance; the open formulas, the assumptions register and the master copy are what your validators and internal audit test against.
Insights
A practitioner's guide to Basel 3.1 in the UK: what applies on 1 January 2027, what to have ready and what the PRA will look for. Free to read.
By Mark Dougherty, CPA (CAN)How to write an ICAAP the PRA takes seriously: structure, stress testing, capital planning and board challenge, from people who write them.
By Mark Dougherty, CPA (CAN)
The ICAAP is a bank’s own assessment of whether it holds enough capital for its risks; the ILAAP asks the same question of its liquidity and stable funding. The two sit in different Parts of the...
By Mark Dougherty, CPA (CAN) · 7 min readNext step
In 45 minutes we share a screen and walk through the model closest to what you need, using sample data.
Tell us which models you want to see. We will set up a 45-minute walkthrough with sample data.
Prefer email? advisory@risktae.com or +44 20 3996 9599. We use these details only to reply to you: privacy notice.