AI for accounting practices.
Audits and custom builds for the workflows that drain fee-earner hours — client onboarding, document chase, engagement letters, bookkeeping queries, year-end collection. UK, USA, Europe.
Fee-earner hours are
the most expensive thing
you own.
A mid-tier practice — 4 to 40 partners, £2m to £50m equivalent revenue — runs on chargeable hours. Every hour a qualified accountant spends chasing documents, drafting engagement letters, classifying receipts, or answering bookkeeping questions is an hour not spent on the work clients pay them for.
The pressure isn't new. What's new is that practitioners on both sides of the Atlantic have a tool — large language models in the right wrapper — that can absorb a meaningful slice of that admin without compromising the partner-led judgement that the firm is actually built on.
The question is no longer whether AI fits a UK practice running up to a January 31 self-assessment or HMRC MTD deadline, or a US practice running up to April 15 returns and 1099/W-2 season. It's where AI fits, where it doesn't, and what sequence to ship in. That's the work of an audit.
Four workflows we ship.
One we explicitly don't.
Every audit produces a ranked list. These four show up at the top across nearly every mid-tier practice we've audited. They're high-volume, repetitive, time-sensitive, and don't require a qualified accountant to run them — exactly where AI earns its keep.
Year-end document chase
AI handles: tracking what each client owes, sending personalised reminders that escalate as the deadline approaches, logging incoming documents, surfacing the cases that need a phone call instead of another email.
Human keeps: partner-led conversations with complex or sensitive clients
Engagement letters
AI handles: drafting first-pass engagement letters from a structured intake conversation, populating clauses against the practice's standard library, flagging anything non-standard for review.
Human keeps: final review, partner sign-off, anything non-standard
Bookkeeping query triage
AI handles: first-line answers to client emails on categorisation ("what's this Stripe payout?"), deadline questions, and standard "is this deductible?" queries, trained on the practice's prior responses.
Human keeps: anything ambiguous, anything client-relationship-sensitive
Onboarding & AML / KYC
AI handles: intake document collection, identity verification orchestration, AML/KYC checks against the relevant regional rule set, structured handover to the partner who'll run the relationship.
Human keeps: final compliance sign-off, partner relationship handshake
What we don't recommend automating
Partner advisory work.The complex conversations on year-end planning, tax strategy, succession, and client growth — that's the work the firm is built on, and the work clients actually pay senior fees for. We build everything around it. We don't build over it. If anyone tells you they're going to “automate the advisory” you're being sold to.
A 4-partner UK practice.
One year-end cycle.
This is our first published accounting case study. The firm is UK-based; we're actively scoping equivalent engagements with US and European practices through 2026.
Killing the year-end document chase
Arthur T's 4-partner practice was losing 24 fee-earner hours a week chasing documents during their 12-week year-end crunch. We audited the firm, identified document chase as the highest-impact AI fit, built the system in 3 weeks, and protected partner advisory work from automation entirely.
One year-end cycle later: 18 fee-earner hours back per week, 88% on-time client submissions (from 62%), £15,500 of billable advisory capacity recovered, only 3 clients past the HMRC deadline (down from 14).
Read the full case study →Three stages.
One funnel.
Same engagement model across all three sectors. The briefing is free. The audit is paid and always in person. Builds are scoped from the audit.
A 45-minute diagnostic call with a written memo within 24 hours. Identifies the highest-impact areas where an audit would add clarity. Honest recommendation on whether to proceed.
Two days on-site with the founder. Written report, prioritised opportunity list, 90-day roadmap. Always in person — anywhere in the UK, USA, or Europe. Travel agreed in advance.
Custom builds scoped from your audit. Document chase. Engagement letters. Onboarding. Query triage. Delivered in 14 days. Optional management retainer for ongoing support.
What partners ask first.
Compliance is part of the audit, not an afterthought. We work within your existing professional conduct framework — ICAEW, ACCA, AICPA, state CPA boards, or the relevant European bodies — not around it. Where a workflow can’t be automated within regulatory limits, the audit says so and recommends what to do instead.
Wherever you decide. Typically inside your existing practice management or accounting software (Xero, QuickBooks, CCH, Iris) or in a dedicated environment configured under your control. halcroft does not host client data on its own infrastructure unless explicitly agreed. The specific architecture is decided during the audit, accounting for GDPR (UK/EU) or state privacy laws plus SOC 2 framing (US).
The audit explicitly maps the workflows we recommend against your jurisdiction’s filing calendar. For UK practices that’s MTD for ITSA, January self-assessment, and the corporation tax cycle. For US practices it’s 1099/W-2 season, the April 15 cycle, and quarterly estimates. For European practices it’s local filing deadlines per country. The 14-day builds are scoped to ship before the next material deadline wherever possible.
Yes. You own the code, the configuration, and the documentation. We deliver a written runbook and a handover session so your team can operate the system independently. The optional management retainer covers hosting, monitoring, and the small adjustments needed each cycle — it’s not a lock-in.
The published case study (linked above) is a 4-partner UK practice. The audit and build model is sized for mid-tier firms — typically 4 to 40 partners or principals, £2m to £50m equivalent revenue. Larger practices may need a slower rollout per office; smaller practices typically don’t need an audit, just a briefing.
The free briefing is bookable across UK 9am-7pm, which covers US East AM and the full CET working day. US West gets evening UK slots. The audit is in person at your office. Builds and ongoing retainers run remotely with async-first updates and a weekly check-in scheduled to your team’s working hours.