Tx-Rails — UK Housing Association Pricing Sheet
The auditable underlay for UK Social Housing. Cryptographic continuous audit + procurement evidence + supplier-attestation, sitting underneath your existing Housing Management System, repairs platform, tenant portal, and asset-management database. We don’t replace any of them — we bind to them via a published integration mode and produce tamper-evident, regulator-verifiable evidence of everything they record. See iiot-housing.md for the full underlay positioning.
What you get
Three integrated capabilities, one platform:
-
Continuous cryptographic audit infrastructure
Every transaction, every state change, every safety-critical record committed to a Byzantine-fault-tolerant ledger and Merkle-anchored to a public DLT. Continuous evidence stream replaces the manual IT-controls audit work currently billed at £200–£800/hour.
Aligned with: ISA (UK) 315, FRC Practice Note 14, Social Housing Regulation Act 2023, April 2024 consumer standards, Building Safety Act 2022, Awaab’s Law evidence requirements. -
Supply-chain automation with smart-contract-equivalents
Milestone-triggered payments, automated purchase orders, real-time supplier compliance attestation, ESG/Scope-3 evidence by default. Unlimited data capacity (database-backed, not on-chain). The HA’s own procurement system (whatever it is — Proactis, Bonfire, in-house build) feeds events into Tx-Rails via change-data-capture or atomic dual-write; the underlay produces verifiable settlement evidence without anyone changing their existing accounting workflow. -
Regulator & auditor-grade evidence pipeline
Live data access for the Regulator of Social Housing; cryptographic chain-of-custody on building-safety records; substantive audit evidence accepted under FRC PN 14 by Big Four / Top-10 auditors.
What we sell — and what we don’t
What we don’t sell at any price: full transaction-front-end replacement. We don’t build your tenant portal, your staff dashboard, or your supplier-management platform. Your customer- and supplier-management screens stay put — Tx-Rails does not displace the systems your customers, staff, and supplier-relationship managers already use. If you need a new browsing / catalogue / case-management screen, your engineering team builds it against our published SDK with our reference connectors.
What we do sell falls into two groups:
A. Operator utilities (bundled — Items 2 + 4 in the pricing table)
Three thin GUIs that the underlay needs to be usable by humans inside the HA. They ship with the platform; customer-specific configuration is itemised separately.
- Evidence-retrieval portal — your compliance officer pulls cryptographic proofs of specific transactions in response to regulator, auditor, or inspector questions. Generates evidence packs in formats acceptable to the Regulator of Social Housing, FRC PN 14 substantive-evidence requirements, and Big Four / Top-10 audit firms.
- Compliance-officer dashboard — live view of consumer-standard compliance, Awaab’s Law deadline tracking, building-safety attestation status. Read-only, fed from the underlay.
- Trust-management UI — operator-side controls for your enterprise PKI: certificate issuance, revocation, partner-org onboarding, kill-switch (
HA_SYSTEM_MODE).
B. Supply-network attestation UI (optional — Item 5 in the pricing table)
A thin signature surface that lets external parties — subcontractors, materials suppliers, certifiers, joint-venture partners — interact with the BFT-mesh’s multi-party flows. This is explicitly in scope for us to develop, distinct from the “no procurement-portal replacement” line above. The scope is strictly the signature / attestation surface, not a procurement-management platform.
What it does:
– Suppliers authenticate via Elastos DID (or interim username/password)
– View pending attestations the underlay has emitted for them: milestone co-signatures, ESG/Scope-3 evidence requests, gas-safety / Awaab’s Law certifications they’re responsible for, invoice acceptance
– Sign + submit, with the cryptographic proof landing immediately in the BFT mesh
– Each supplier sees only their own queue (multi-tenant via entnum)
What it explicitly is NOT:
– A supplier catalogue / sourcing / RFQ / contract-management replacement (those stay in your existing Proactis / Bonfire / in-house build)
– A supplier CRM
– An accounting front-end for the supplier’s books
When you’d buy this: your existing supplier portal can’t carry M-of-N cryptographic co-signature, or you have no supplier portal at all (common for smaller HAs and informal supplier rosters).
When you wouldn’t: large suppliers integrate directly via our SDK + reference connectors against their own systems, at no per-supplier cost from us.
Pricing — five line items, four budget homes (Item 5 optional)
| # | Item | Type | Indicative price (30k-home HA) |
|---|---|---|---|
| 1 | One-off integration & onboarding — integration-mode selection (hash-only attestation / atomic dual-write / change-data-capture observer), CDC or dual-write hooks against your HMS + repairs + asset-management platforms, certificate-authority setup, UAT, launch | One-off CapEx — capitalisable over 3–5 years | £75,000 – £150,000 |
| 2 | One-off operator-UI configuration — evidence-retrieval portal skinned to your brand; regulator-export templates (FRC PN 14, RSH consumer-standard reports, Awaab’s Law deadline pack, BSA 2022 safety-record format); compliance-officer dashboard customised; SSO integration with your IdP (Azure AD / Okta / Entra) | One-off CapEx — capitalisable over 3–5 years | £30,000 – £60,000 |
| 3 | Annual support & maintenance (security patches, OS/library upgrades, UK-hours help desk, 99.5% uptime SLA, integration-mode adjustments as your HMS/asset-mgmt landscape evolves, operator-UI updates for new regulator templates as they’re published) | OpEx — renewable annually | £50,000 / year |
| 4 | Tx-Rails platform access — BFT infrastructure, audit attestation, Hedera anchoring, dual-DC redundancy, regulator pipeline. Includes the three operator utilities (evidence-retrieval portal, compliance-officer dashboard, trust-management UI) — what you pay to configure them is Item 2; using them is bundled here. | OpEx — annual platform subscription, £5 per home/tenancy | £150,000 / year |
| 5 | Supply-network attestation UI (optional) — thin signature surface for external parties: subcontractors, materials suppliers, joint-venture partners. Supplier DID auth, per-tenant queue of pending attestations, M-of-N co-signature flows. NOT a procurement-portal replacement; see scope detail above. | One-off CapEx — capitalisable over 3–5 years | £40,000 – £100,000 |
| Year 1 total (mid-point of Items 1 + 2 range; Item 5 excluded) | £357,500 | ||
| Year 1 total with Item 5 mid-point | £427,500 | ||
| Year 2+ ongoing | £200,000 / year |
Item 1 — what governs the range:
– £75k floor — hash-only attestation (Mode A): your HMS commits as normal; we receive only content hashes. Lowest integration cost; retroactive verifiability.
– £150k ceiling — atomic dual-write (Mode B): your HMS and Tx-Rails commit in the same transaction. Highest integrity guarantee; suits new builds or major HMS refreshes.
– Most HAs land mid-range with change-data-capture observation (Mode C) at ~£100-120k — zero application code change, but more wiring against your DB replication log.
Item 2 — what governs the range:
– £30k floor — standard configuration: pick from a library of pre-built regulator templates, light brand skinning, off-the-shelf SSO connectors (Azure AD / Okta / Entra).
– £60k ceiling — bespoke regulator workflows (your auditor’s preferred FRC PN 14 evidence pack format), custom compliance dashboards, custom report layouts, deeper IdP integration with custom claim mapping.
– Item 2 is optional: HAs comfortable with the default skin + standard exports can skip and adopt later — drops Year 1 to £275k mid-point.
Item 5 — what governs the range:
– £40k floor — single-flow supplier-attestation kiosk (e.g. just gas-safety certificate co-sign), single tenant role, default branding, username/password auth.
– £100k ceiling — full multi-flow attestation hub: milestone-payment co-sign + ESG/Scope-3 evidence + safety-cert + invoice acceptance, multiple supplier role tiers, Elastos DID auth, deep brand alignment, per-flow custom workflows.
– Item 5 is optional and skippable: HAs whose existing supplier portal (Civica, Aareon, Proactis, Bonfire) can carry M-of-N co-signature via SDK integration don’t need this. The decision usually comes down to whether your supplier portal can produce signed structured data the underlay can verify — most current generation portals can’t, hence demand for this line.
Volume tiering (Item 4): £5/home for the first 30,000 homes; £3/home thereafter. A 100,000-home HA pays £150k + (70k × £3) = £360k/year for Item 4 — not £500k.
Payback and ROI
For a typical 30,000-home HA. The sector-median procurement spend is £5,136 per home per year (RSH Global Accounts 2024), so a 30k-home HA’s annual procurement spend is on the order of £150M.
| Annual benefit | Conservative | Realistic |
|---|---|---|
| Audit IT-controls displacement (under FRC PN 14) | £100,000 | £200,000 |
| Procurement reconciliation & dispute overhead reduction | £150,000 | £400,000 |
| Reduced leakage to overcharging, duplicate billing, fraud (industry estimates 1–5% of construction spend; CIOB cites upper bounds up to 10%) | £300,000 | £1,500,000 |
| Regulatory compliance evidence (consumer standards 2024, BSA 2022, Awaab’s Law) | £100,000 | £400,000 |
| Total annual value delivered | £650,000 | £2,500,000 |
| Tx-Rails Year 2+ cost | £200,000 | £200,000 |
| Net annual return | £450,000 | £2,300,000 |
| ROI multiple | 3.3× | 12.5× |
Year 1 payback period: under 9 months even at the conservative end.
Pilot terms — non-binding, parallel-run, zero operational risk
- 3 months running Tx-Rails alongside your existing systems. No production switchover.
- Mode A (hash-only) integration with your housing management system for the pilot. No changes to your data or workflows; no new screens for your staff. We receive content hashes only and produce verifiable evidence rows; you can compare against your HMS’s own records at any time.
- Walk-away clause: if at month 3 the metrics don’t meet agreed targets, the engagement ends. No further fees, no exit penalties.
- Audit acceptance pre-validation: before signing, we’ll meet with your auditor to confirm the attestation artifacts meet their FRC PN 14 evidence standards. (We have a pre-existing relationship with KPMG’s UK Housing practice that we can leverage.)
- Data ownership: all data committed to Tx-Rails is yours. Cryptographic exports are open-format and re-readable indefinitely — even if Tx-Rails the company ceases to exist.
Why now
- April 2024 consumer standards materially increased HA evidentiary burden.
- Audit fees rising at low-double-digit CAGR since 2017 (FRC: average PIE audit fee £1m in 2024, +7% YoY; ICAEW: +75% cumulative since 2017).
- Building Safety Act 2022 introduces criminal liability for inadequate safety records.
- Awaab’s Law (Social Housing (Regulation) Act 2023) introduces deadlines for hazard responses with evidentiary trail requirements.
You are facing an unavoidable evidentiary-burden uplift. The question is whether you meet it with more manual consultant work or with continuous cryptographic infrastructure.
Next steps
- 30-minute discovery call with your CIO + CFO to confirm scope fit.
- Letter of Intent — non-binding, signals pilot interest; required for our investor commitment, no obligation to you.
- Pilot kick-off within 8 weeks of LOI.
Contact: John Olsen · john@itotchaincloud.com.au · +61 490 114 879
Reference data sources: This pricing sheet’s audit-fee benchmarks are drawn from the published annual reports of Clarion Housing Group (FY23/24), L&Q Group (FY23/24), Peabody Group (FY23/24), Sanctuary Group (FY24/25), and Riverside Group (FY23/24). FRC Practice Note 14 (Revised March 2021). ICAEW / Audit Analytics 2024 audit-fee trend data. Full citations available on request.
Tx-Rails — Built by IT/OT Chain & Cloud Australia (ITOTCCA). Sydney · London.