Interim & fractional senior finance for multi-GAAP situations

Where group GAAP
meets local GAAP,
ambiguity gets expensive.

Support for carve-outs, reporting gaps and cross-jurisdiction finance situations where the answer must hold — to group, to local statutory, and to tax. Six Western European jurisdictions populated. Fixed-fee engagements from €25,000.

Principal Duncan Stirling
Best fit Carve-outs & bolt-ons · Reporting discontinuities & gaps · Process reform & rebuilds
Reporting IFRS · US GAAP · 6+ local GAAPs
01 / Proposition

Where one framework ends and another begins,
somebody has to make the facts hold.

The group reports under IFRS or US GAAP. The local entity reports under HGB, PCG, FRS 102, Swiss GAAP, BW 2 Title 9, or another.

The tax authority looks at the local accounts. The audit firm looks at both. The board expects one coherent answer.

Technical, evidential, and time-sensitive.

That is the point at which generic finance support stops being enough. Stirling Resources provides interim and fractional senior finance support for multi-GAAP situations: tightly scoped, fixed-fee where possible, and executed through a documented methodology.

This is not a generalist finance consultancy. It is one person, one focus, one operating model. A 90-minute scoping conversation is the first step; if there is no fit, both parties know inside the hour.

02 / Situations

Three situations recur.
The names differ.
The pressure does not.

Different triggers, different timetables, different stakeholders — but the same underlying problem: where group reporting meets local statutory & tax reality, somebody has to bridge the two properly, and under time pressure.

Situation 01

Private equity carve-outs and bolt-ons.

The deal is done. The disruption is not. The Transition Service Agreement is ending or the integration is beginning, but the timetable does not pause. Reporting starts. Auditors arrive. Tax inspections can happen. Before the organisation is fully ready, someone has to make the first answer defensible.

High urgency · Fixed window · PE-owned platforms
Situation 02

Reporting function gaps.

A senior controller leaves. The handover never happened. The close is mid-flight. The filing deadline has not moved. Somebody has to take hold without losing audit confidence, missing a filing, or exposing the gap before the work is under control.

Acute timing · Continuity-led · Mid-cycle pickup
Situation 03

Process and standard reform.

The function still works — until it doesn't. Processes are improvised. Methodology lives in heads, not files. Audit findings recur. New ownership, new leadership or regulatory change makes the current arrangement too fragile to defend. The task is to redesign it before the next cycle tests it.

Planned scope · Improvement-led · Documented handover

The carve-out where the auditor's first PBC list arrives before the new finance team is functional. The bolt-on where statutory positions across two jurisdictions disagree, and the auditor finds it first. The retirement where the long-tenured controller walked out the door with the temp/perm differences in their head. These are the situations where the methodology earns its fee — and where the alternative is a finding nobody wants to explain to the board.

03 / The work

Three shapes of work.
One standard of execution.

The trigger may differ. The work tends not to. Most engagements take one of three shapes: stabilise the function, run the cycle, or put the work into a form that can be handed over cleanly.

Pillar 01

Rebuild it.

Establish the finance function or rebuild it after a discontinuity. Set the calendar. Make the first close work. Hand over when the dust has settled.

  • 100-day finance plan against the brief
  • Working close calendar by Day 30
  • Opening balance sheet and audit handover
  • Statutory and tax base set down
  • Permanent successor recruitment brief
Pillar 02

Run it.

The recurring cycle of close, consolidation, statutory accounts, and tax. Built once, documented properly, handed over to operate at lower cost.

  • Month-end and quarter-end close design
  • Group consolidation submissions
  • Local statutory accounts in 6+ GAAPs
  • Tax provision and return preparation
  • Audit pack and audit-room defence
Pillar 03

Ready it.

Reporting cleanup for a transition — a sale process, a regulatory change, or a permanent CFO arriving. Documented, reviewable, defensible.

  • Reporting hygiene review and remediation
  • Process redesign with documented handover
  • Quality-of-earnings preparation
  • Vendor due diligence support pack
  • Day-1 readiness for the next owner or CFO
04 / Coverage

Where the methodology is
built and tested.

Six Western European jurisdictions are already populated. More are being added. Each one reviewed properly in engagement.

CLOSE CONSOLIDATION STATUTORY TAX AUDIT PACK Germany HGB France PCG United Kingdom FRS 102 · IFRS Ireland FRS 102 · IFRS Netherlands · Switzerland BW 2 Title 9 · OR/CO · FER In build & expansion

Fig 01 · Coverage matrix · jurisdictions × work types · filled = populated, dashed = in build Not promised. Populated. Not theoretical. Worked.

Jurisdictions — current

  • GermanyHGB · DE-GAAP
  • FrancePCG · FR-GAAP
  • United KingdomFRS 102 · IFRS
  • IrelandFRS 102 · IFRS
  • NetherlandsBW 2 Title 9 · DAS
  • SwitzerlandOR/CO · Swiss GAAP FER
  • Italy · Luxembourg · Belgium · othersin build

Group frameworks & topics

  • IFRSESMA / IAASB
  • US GAAPSEC / PCAOB
  • Group closeMonthly · quarterly
  • ConsolidationFX · IC · NCI
  • Acquisition accountingIFRS 3 · ASC 805
  • Pillar TwoQDMTT · IIR · UTPR
  • CSRD / sustainabilityESRS aligned
05 / Methodology

A methodology library
built to carry the work.

What matters is not simply having a method, but having one in a form that can actually support delivery.

GROUP REPORTING LAYER IFRS or US GAAP THE GAAP BRIDGE Where the work happens Adjustments · Methodology · Reconciliations · Documentation LOCAL STATUTORY HGB · PCG · FRS 102 · OR/CO · BW 2 Filed at companies registrar → ANNUAL ACCOUNTS LOCAL TAX Corporate income tax Filed at tax authority → TAX RETURN 01 02 03

Fig 02 · The two-layer architecture · group reporting flows through the bridge into local statutory and local tax Three languages. One set of facts. All of them defensible.

A CROSS-CUTTING WORKFLOWS Used across every engagement · Audit pack assembly & audit-room defence · Escalation memos and judgement calls · Variance commentary (MoM, QoQ, YoY) · Senior communications & reporting register B THE CLOSE CYCLE Recurring close work · Close calendar & timetable design · Manual journals & recurring postings · Reconciliation discipline · Group consolidation submissions C STATUTORY & TAX Annual local accounts and filings · Trial balance review & stat adjustments · GAAP bridge (group to local) · Tax provision and return preparation · Statutory narrative & local audit defence → 6+ JURISDICTIONS POPULATED D GROUP CONSOLIDATION Entity TBs to group statements · Intercompany eliminations & URP · FX translation & CTA · Acquisition accounting (PPA · goodwill · NCI) · Equity method & joint arrangements → IFRS AND US GAAP TRACKS

Fig 03 · The four-domain library · what's actually built and documented Working files. Not slideware. Built to run the work, not to decorate it.

The work is technical, but the structure is simple: one process layer that travels across engagements, and one framework layer that changes jurisdiction by jurisdiction. New coverage extends the system without rewriting it. Fig 02 shows the principle. Fig 03 shows what is built and documented to execute it.

Each jurisdiction file documents the recurring temp/perm differences, the specific tax computation mechanics, the local statutory narrative requirements, and the audit-pack assembly approach. Each group GAAP file documents the consolidation mechanics — intercompany eliminations, FX translation, acquisition accounting, equity method, NCI.

What the library covers, end-to-end
Close · Consolidation · Statutory · Tax · Audit pack

The library is continuously extended. Italy and Luxembourg are next; Belgium, the Nordics, and central Europe follow. Each addition is built to the same two-layer pattern: the process layer needs no change; the new jurisdiction plugs in alongside the existing six.

Every jurisdiction file is first-pass methodology requiring final review by a locally qualified practitioner — a Wirtschaftsprüfer, an avocat fiscaliste, a chartered tax adviser, a Commissaire aux Comptes. This review is part of every engagement, not an afterthought. The proposition is honest about what one person can verify alone.

Works alongside

This methodology works alongside CCH Tagetik · OneStream · Workiva · LucaNet · SAP Group Reporting · Oracle Hyperion — and other corporate performance management platforms. It provides the multi-GAAP judgement layer that the platforms assume but do not themselves provide.

Pre-platform during the first 180 days, before implementation begins. Around-platform where the methodology gap is the binding constraint, not the software. Post-platform-but-pre-people when the senior controller who knew how to operate the system has departed.

06 / Background

A career built around the work,
not around one title.

This practice is built on finance work seen from several sides: operator, controller, external reporting lead, founder, analyst, engineer. That matters because multi-GAAP situations are rarely only technical. They are operational, evidential, commercial and time-sensitive at once.

Qualifications & education
ACCA-trained BAI / MA Mechanical & Materials Engineering, Trinity College Dublin International MBA, Nyenrode Business Universiteit EU–China Managers Exchange Programme
Adjacent work

Published independently · strategy methodology.

Alongside the multi-GAAP reporting practice, I publish independent strategy work. The Missing Move is a free methodology and growing case library for resolving business contradictions — the trade-offs where every obvious move makes something else worse.

Particularly useful for diligence and value-creation work in succession-driven SME acquisitions, where every target is a bundle of unresolved contradictions waiting to be made visible.

08 / Next step

Ninety minutes.
No fee.
Then we both know.

Bring the situation as it is: the deal, the departure, the damaged process, the drifting frameworks, the deadline. Leave with a clear view on whether this problem fits the proposition, and whether the proposition fits the problem.

On-site availability Hamburg · Galway · Dublin Response time Within 24 hours