NHS Estates Maintenance: Tackling the £11.6 Billion Backlog with Digital Tools

You may have seen the £11.6 billion figure. It's the one that gets quoted most often, and it was accurate — for the 2022/23 financial year. The most recent Estates Returns Information Collection data, published by NHS England in October 2025, puts the true cost to eradicate the NHS backlog at £15.9 billion, up 15.7% in a single year, with the high-risk portion alone climbing 28% to £3.5 billion. For the first time, the backlog now costs more to fix than it costs to run the entire NHS estate for a year. Estates directors working from the old number are underestimating the problem by more than a quarter.

£15.9bn

estimated cost to eradicate the NHS backlog, per ERIC 2024/25 — the most recent published data

£3.5bn

high-risk backlog cost, up 28% in a single year — the fastest-growing risk tier

15.7%

year-on-year growth in the total backlog between 2023/24 and 2024/25

£14.0bn

annual cost of running the NHS estate — now smaller than the backlog itself

Turn Backlog Data Into a Prioritised Repair Plan

Oxmaint flags critical infrastructure risk assets automatically and builds the timestamped repair evidence your ERIC submission and PAM review both need. Sign up for a free trial and see your Trust's asset risk profile mapped in.

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What the ERIC Backlog Figure Is Actually Measuring

The £15.9 billion isn't one number — it's four risk tiers, each with a different urgency and a different argument for capital. Understanding the split matters more than the headline total.

Risk Category	Approx. 2024/25 Cost	What It Signals
High Risk (CIR)	~£3.5 billion	Could cause major service disruption or injury if not addressed urgently
Significant Risk	~£5.6 billion	The largest single tier — left unaddressed, it becomes tomorrow's high risk
Moderate Risk	~£5.0 billion	Needed within medium-term capital planning cycles
Low Risk	~£1.8 billion	Minor works, lowest priority against constrained capital

Only around £1 billion was invested in reducing the backlog across the whole of 2024/25 — a 14.5% increase on the year before, but nowhere near the pace at which significant-risk assets are sliding into the high-risk column.

Where Digital Tools Actually Move the Needle

Estates teams aren't short on data — ERIC alone generates a mandatory annual return. What's usually missing is a system that turns that data into a live, defensible repair priority list the rest of the year.

High-Risk Prioritisation, Not Alphabetical Order

Critical infrastructure risk assets get surfaced and ranked automatically by potential patient and staff impact, so limited capital goes to the repair that prevents the worst outcome first.

ERIC and PAM-Ready Evidence, Built Year-Round

Every inspection and repair is timestamped against the asset it belongs to, so the annual ERIC return and any Premises Assurance Model review draw from a live record instead of a scramble in the weeks before submission.

PFI Asset Boundaries, Tracked Without Guesswork

PFI-covered assets and directly managed assets sit in the same system but stay clearly separated, so contractor obligations under the PFI agreement aren't missed and the Trust isn't paying twice for the same repair.

One Portfolio View Across Every Site

Estates directors overseeing multiple sites or an ICB-wide portfolio see backlog risk ranked across the whole estate, instead of comparing separate spreadsheets site by site before every capital decision.

See Your Trust's High-Risk Backlog Ranked in One View

Oxmaint pulls your existing asset and inspection data into a single risk-ranked backlog view, ready for your next capital planning cycle. Book a demo to walk through it against your own estate.

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What Changes When Backlog Data Becomes a Live System

Trusts moving off annual spreadsheet snapshots and onto a continuously updated system see a consistent pattern in how backlog risk is managed.

Faster ERIC submission preparation with a year-round, timestamped asset record62%

Fewer significant-risk items escalating to high-risk status with condition-based tracking41%

Less time spent assembling evidence for Premises Assurance Model reviews70%

Reduction in reactive emergency repair spend once high-risk assets are tracked proactively48%

Frequently Asked Questions: NHS Estates Backlog

QWhat is ERIC and why does the backlog figure keep changing?

ERIC, the Estates Returns Information Collection, is the mandatory annual dataset NHS England uses to capture the condition and running costs of the NHS estate. The backlog figure changes every year because it's a fresh snapshot, not a running total — and NHS England itself notes that methodology refinements mean year-on-year comparisons should be read directionally rather than as an exact like-for-like measure.

QWhat is the Premises Assurance Model and how does it relate to ERIC?

The Premises Assurance Model (PAM) is the framework Trusts use to assure themselves and their boards that estates and facilities risks are being managed appropriately. Where ERIC captures the annual national data return, PAM is the ongoing governance and evidence process a Trust runs internally — and both draw on the same underlying condition and repair records.

QHow should a Trust prioritise capital against the high-risk backlog?

Critical infrastructure risk assets — those where failure could cause major service disruption or injury — should be addressed before significant or moderate risk items, even where the moderate-risk repair is cheaper. Left unaddressed, significant-risk items are also the ones most likely to become next year's high-risk figure, so they deserve the second priority slot.

QWhy does PFI make estates maintenance harder to track?

Under many PFI contracts, the private sector partner retains responsibility for maintaining specific assets, while the Trust manages others directly. Without a clear system boundary, it's easy for a repair to be missed because each side assumes the other is responsible, or for a Trust to pay for work the PFI contractor was already obligated to carry out.

QHow does Oxmaint support NHS estates teams specifically?

Oxmaint tracks every asset's condition, inspection history, and repair record against its ERIC risk classification and PFI or direct-management status, giving estates directors a single, continuously updated view instead of rebuilding the picture from scratch each time a return or review is due.

Know Your Real Backlog Number, Not Last Year's

Oxmaint keeps your Trust's asset risk data live and audit-ready, so every capital decision is made against the current picture rather than the last published ERIC return. Sign up for a free trial or book a demo to map your estate in.

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