Contractual Forecasts: Appending a Budget Does Not Guarantee Results, but Reasonable Care Still Matters

1. Introduction

This judgment draws an important distinction between guaranteeing a commercial outcome and taking responsibility for the professional preparation of a forecast. A budget appended to a contract does not automatically become a warranty that its predicted profits, costs or sales will materialise. Nevertheless, a specialist who supplies that budget to induce the contract may assume legal responsibility for preparing it honestly, on reasonable grounds and with reasonable skill and care.

The dispute concerned the management of a privately owned aircraft. ACASS Ireland Limited sought reimbursement of expenses and payment of fees from the aircraft’s owner, Amborella Limited. Amborella counterclaimed, arguing that an operating forecast attached to their management agreement promised profitable operation or, at least, a minimum financial performance.

The High Court rejected that interpretation. It nevertheless held that the forecast had legal significance: Amborella reasonably relied on it as a professionally prepared assessment. The counterclaim failed because Amborella did not prove negligent preparation or the absence of a reasonable foundation—not because forecasts are inherently beyond the reach of misrepresentation law.

2. Background and Contractual Setting

The aircraft management arrangement

Amborella acquired a 2008 Cessna Citation XLS+ aircraft and engaged ACASS to manage its operation under an agreement concluded in October 2022. ACASS undertook regulatory, maintenance, crewing and operational responsibilities, including arranging third-party charter flights when the aircraft was available.

The owners wanted charter income to cover the aircraft’s operating costs and their personal flying, preferably generating a surplus. Their experienced aviation adviser negotiated with ACASS. Initially, ACASS waived its usual fixed management fees and agreed to receive commission from charter margins.

Crucially, the agreement remained an owner-funded arrangement. ACASS incurred operating expenditure and was entitled to reimbursement. Clause 9.2 required Amborella, notwithstanding other provisions, to replenish the operating fund where charter revenue was insufficient. It contained no financial cap linked to the forecast.

The disputed forecast

Schedule E, headed “DRAFT/Operating Forecast”, contained detailed spreadsheets predicting costs, charter sales and owner returns. Clause 6.2 described it as “a spreadsheet of predicted costs for the operation of the Aircraft and predicted sales”. It was appended shortly before execution, at Amborella’s request.

The forecast assumed 100 annual owner hours and presented scenarios involving between 400 and 800 charter hours, with 600 charter hours as the principal target. At least one scenario contemplated an owner contribution or loss rather than a profit. The figures depended on assumptions including flight duration, maintenance expenditure, fuel prices and aircraft availability.

Amborella maintained that the lower charter-hours scenario established a contractual minimum and that the overall schedule promised a defined financial result. ACASS maintained that it was an achievable budget, not an undertaking to underwrite commercial performance.

Underperformance, revised terms and termination

The operation did not achieve the forecasted financial results. Relevant differences included greater owner usage, shorter flights and substantial maintenance downtime. A subsequent addendum introduced a €10,000 monthly management fee, waived where commission exceeded that amount in the same month.

Following a December 2023 review, ACASS supplied a revised 2024 budget forecasting an operating loss and fewer charter hours. Amborella later transferred the aircraft to LUMINAIR GmbH, which used a materially different leasing and floating-fleet model and expressly guaranteed minimum paid flight hours.

Amborella served 60 days’ termination notice on 21 November 2024. The aircraft and records were released on 20 January 2025, at the end of the notice period.

3. Summary of the Decision

• No warranty of results: Schedule E did not guarantee profitability, minimum charter hours or specified owner returns.
• A legally significant representation: ACASS represented that it had honestly and competently prepared an achievable forecast on identified assumptions. Amborella’s reliance was reasonable and foreseeable.
• No proven negligent preparation: Underperformance and identified budgeting omissions did not, on the evidence presented, establish a material departure from reasonable professional care.
• No statutory recovery: The claim under section 45 of the Sale of Goods and Supply of Services Act 1980 failed. ACASS established its actual belief in the forecast’s achievability and reasonable grounds for that belief.
• Other counterclaims failed: Overcharging, negligent management, loss arising from the Textron compensation claim and wrongful delay in handover were not established.
• Monetary outcome: ACASS recovered €147,131 from the remaining disputed balance of €230,934. Amborella’s counterclaim was dismissed. Costs and final orders were reserved.

4. Precedents Cited and Their Influence

Identifying a contractual warranty

Carey v. Independent Newspapers (Ireland) Ltd. [2004] 3 I.R. 52 supplied two foundations. First, whether a statement becomes a contractual warranty depends on objectively assessed intention, not merely terminology. Second, the same circumstances can support liability in both contract and tort.

Through Carey v. Independent Newspapers (Ireland) Ltd., the court referred to Sceales v. Scanlon (1843) 6 I.L.R.C.L. 367. That authority establishes that words affirming a fact on the faith of which a party contracts can create a warranty without technical language. Accordingly, Amborella did not fail simply because the agreement omitted the word “warranty”. Its difficulty was that the document, read as a whole, did not objectively promise the alleged financial outcome.

AIB Mortgage Bank v. Hayes [2016] IEHC 280 appeared as a factual comparison. An alleged promise of interest-only repayment for ten years was readily identifiable. Here, by contrast, Amborella’s formulation shifted between profitability, cost neutrality, charter hours and a range of owner returns. The comparison highlighted the need to identify precisely what was allegedly promised before deciding whether it was binding.

Forecasts and professional responsibility

Esso Petroleum Co. Ltd. v. Mardon [1976] 2 All E.R. 5 was the central forecast authority. Esso supplied an estimated petrol throughput without properly revising it after planning requirements materially changed the site’s accessibility. The estimate was provided by a specialist and relied upon by the prospective operator.

The significance of that decision was not that every professional forecast guarantees its numerical result. Rather, a forecast may carry a warranty that it is sound and reliable in the sense of having been prepared with reasonable care and skill. It may also support negligent misrepresentation liability. Roberts J. adopted that distinction: uncertainty about future results does not eliminate responsibility for present professional judgment.

Hedley Byrne & Co. Ltd. v. Heller & Partners Ltd. [1964] A.C. 465 supplied the broader foundation for imposing a duty of care concerning negligent statements causing pure economic loss. ACASS’s specialist knowledge, the commercial purpose of the forecast and foreseeable reliance brought the case within that general framework.

Lion Nathan Ltd. v. C-C Bottlers Ltd. [1996] 1 W.L.R. 1438 demonstrated how parties can expressly warrant a forecast’s preparation rather than its eventual accuracy. The relevant warranty concerned good faith, a proper basis and achievability in light of current trends and performance. Liability followed because the forecast had not been calculated on a proper basis.

The High Court distinguished that express contractual wording from Schedule E’s limited incorporation. It also relied on the decision’s recognition that even a carefully prepared forecast can prove substantially inaccurate because of unknown or unforeseeable factors. Actual failure therefore cannot, without more, establish defective preparation.

Misrepresentation, reliance and inducement

Forshall v. Walsh (Unreported, High Court, 18 June 1997) explained the relevant elements: lack of due care in making a representation, inducement to enter an agreement and consequential damage. It also distinguished that claim from the wider tort of negligent misstatement, for which a duty of care must first be established.

Cassa di Risparmio della Repubblica di San Marino SpA v. Barclays Bank Ltd. [2011] EWHC 484 (Comm) informed the objective interpretation of representations. A statement must be construed in context and by reference to its likely effect on a reasonable recipient with the actual recipient’s known characteristics. Amborella’s commercial sophistication and professional advice were therefore relevant, but not decisive against reliance.

Spencer v. Irish Bank Resolution Corporation Ltd. [2018] 2 I.R. 669 supported the conclusion that specific investment projections intended to persuade a recipient to transact cannot later be dismissed as meaningless promotional material. It also established that a representation need only contribute to the contractual decision; it need not be the sole inducement.

The judgment applied Donnellan v. Dungoyne Ltd. [1995] 1 I.L.R.M. 388, as approved in Spencer v. Irish Bank Resolution Corporation Ltd., both to distinguish substantive representations from mere “sales talk” and to address contributing inducement. Schedule E was detailed, discussed and used commercially. Its significance was not erased by the presence of other reasons for contracting.

Shaftsbury House Ltd. v. Lee [2010] EWHC 1844 (Ch.) reinforced that distinction: “puffery” does not encompass communications the recipient is expected to take seriously. Schedule E was intended to be taken seriously as professional forecasting, even though not as a guaranteed outcome.

Special expertise and the statutory remedy

Pat O'Donnell & Co. Ltd. v. Truck & Machinery Sales Ltd. [1997] 1 I.L.R.M. 466 supported the duty of a person professing special knowledge or skill to exercise reasonable care when providing advice, information or opinion intended to induce a contract. The judgment also noted Supreme Court approval of the relevant principle at [1998] 4 I.R. 191.

The same authority informed the statutory analysis: section 45 creates a damages remedy for non-fraudulent misrepresentation without requiring proof of a duty of care. This made it necessary to consider the statutory route separately from ordinary negligence.

5. Analysis of the Court’s Reasoning

A. Incorporation is not the same as a promise of performance

The court rejected the proposition that attaching a forecast to a contract necessarily converts its predictions into binding outcomes. Incorporation establishes that the document forms part of the contractual materials; it does not, by itself, determine what obligations its contents create.

Several features were decisive:

• The agreement described the figures as predictions, and the schedule retained its forecast heading.
• No clear language promised minimum charter hours, maximum costs or guaranteed returns.
• Amborella accepted that individual cost figures were not guaranteed.
• The agreement expressly required Amborella to fund operating shortfalls, without a Schedule E cap.
• The payment, default and damages provisions were not adapted to address failure to meet Schedule E.

The obligation to replenish the operating fund was particularly important. It allocated financial risk to Amborella in circumstances where charter revenue did not cover costs. Reading Schedule E as an undertaking by ACASS to absorb that same risk would conflict with the agreement’s operative structure.

The decision does not establish that forecasts require express warranty terminology to have contractual effect. The court expressly recognised the contrary. It establishes that contractual effect must be identified through the language, context and risk allocation of the particular agreement.

B. The forecast represented the quality of its preparation

ACASS argued that a forecast concerned the future rather than an existing fact and therefore could not ground misrepresentation liability. The court rejected that argument as too broad.

A prediction can communicate present matters: that its maker genuinely holds the stated opinion, possesses reasonable grounds for it and has exercised reasonable professional care in reaching it. Those matters are capable of being assessed when the forecast is made.

Schedule E therefore represented that ACASS had prepared, in good faith and with reasonable care, a forecast it regarded as achievable on the identified assumptions. This was a representation capable of grounding liability, not a finding that ACASS had actually misrepresented those matters.

The distinction is central: legal responsibility for a forecast is not necessarily responsibility for the forecasted result.

C. Independent advice did not eliminate reasonable reliance

Amborella’s aviation adviser had extensive industry experience and participated in the preparation and discussion of the forecast. Nevertheless, ACASS had greater knowledge of its own management model, charter performance and operating costs.

ACASS supplied Schedule E to secure the management business, discussed it over several months, agreed to append it to the contract and subsequently used it as a reporting benchmark. The court accepted that it contributed to Amborella’s decision to contract.

The adviser’s involvement could lessen the practical extent of reliance, particularly concerning owner travel patterns and assumptions within the adviser’s knowledge. It did not extinguish ACASS’s own responsibility for its specialist forecasting. Commercial sophistication likewise did not make reliance on professional competence unreasonable.

D. The correct inquiry was preparation, not hindsight accuracy

The counterclaim’s principal evidential weakness was its emphasis on disappointing results rather than demonstrable defects in the original forecasting process. The court required evidence addressing what a reasonably competent operator could have forecast using information available at the time.

ACASS’s honest belief was supported by contemporaneous communications and its initial willingness to receive remuneration solely through charter commission. That arrangement aligned its remuneration with successful charter activity. Honest optimism was not conclusive, however: the court separately examined whether the forecast had a reasonable professional foundation.

Owner hours and repositioning

Schedule E divided total flight time into owner hours and charter hours. The court held that owner hours included unsold repositioning flights associated with personal use. If a repositioning flight was sold to a charter customer, it counted as charter activity instead.

The later jet-card payment arrangements did not change that operational calculation. Those arrangements concerned how the owners paid funds into the operation, not an agreement shifting the cost and availability consequences of repositioning to ACASS.

Using the figures adopted in the court’s analysis, 2023 involved 172 owner hours rather than the forecast 100, alongside 372 charter hours. Total utilisation exceeded the lower forecast scenario’s 500 total hours. This undermined the suggestion that insufficient overall aircraft use alone demonstrated an inherently unrealistic forecast. The court did not quantify precisely how much charter business was displaced by owner use.

Flight duration, pricing and maintenance

Schedule E expressly assumed an average flight sector of 2.5 hours. Actual flights were shorter. Because landing charges and other costs arise per flight rather than simply per hour, shorter sectors increase hourly operating costs.

The evidence did not establish that the stated sector-length assumption was negligently chosen on the information available to ACASS. Nor did it establish that the forecast charter rates were unachievable; ACASS sometimes obtained rates above budget.

Maintenance presented two linked effects: expenditure increased while aircraft availability and charter revenue decreased. The experts agreed that necessary scheduled maintenance and rectification of unscheduled defects could not lawfully be avoided. They did not substantiate specific alternative decisions that would have materially improved the outcome.

Importantly, the evidence did not justify treating every maintenance event as extraordinary. The maintenance experts ultimately agreed that the aggregate unscheduled downtime was generally normal for an aircraft of this age. The counterclaim nevertheless failed because the evidence did not connect the actual maintenance experience to a proven defect in the original forecast or its management.

Budgeting omissions

The court acknowledged inadequate provision for crew travel and accommodation, together with omitted navigation fees. These were genuine weaknesses, not matters dismissed as irrelevant merely because the document was a forecast.

However, the evidence did not adequately demonstrate their effect on overall forecast profitability or establish that the preparation process fell below reasonable professional standards. The expert reports did not identify an accepted methodology or standard that ACASS had breached, or explain why a reasonably competent operator could not have prepared the forecast in this manner.

This conclusion must remain evidence-specific. The judgment does not grant immunity for budgeting omissions. A material omission, supported by appropriate evidence of professional fault and causative significance, could produce a different result.

E. Forecasting negligence and operational negligence are distinct

The court separately distinguished negligent preparation of Schedule E from negligent performance of the management agreement. A forecast might be competently prepared but subsequently implemented negligently; conversely, competent management cannot cure an originally misleading projection.

Amborella did not establish either case. General assertions that maintenance could have been cheaper or faster were unsupported by sufficiently specific analysis. The maintenance evidence endorsed ACASS’s general approach, and the forensic accounting evidence identified no remaining discrepancies, overcharges or errors after duplicate items had been reversed.

F. Section 45 imposed a separate statutory burden

Section 45(1) of the Sale of Goods and Supply of Services Act 1980 provides a damages remedy where a contracting party suffers loss following a misrepresentation by the other party. Subject to the statutory conditions, the representor must establish that it actually believed the represented facts and had reasonable grounds for that belief up to contract formation. Section 43 brings relevant services contracts within the statutory framework.

This reverse burden must not be confused with Amborella’s burden of proving negligence at common law. The court addressed both. It found no established misrepresentation merely from the failure to achieve the figures and, additionally, found that ACASS had demonstrated actual belief and reasonable grounds for believing the forecast achievable.

The statutory claim therefore failed on the evidence; it was not excluded simply because Schedule E concerned future performance.

6. Other Claims and the Financial Outcome

The management-fee addendum

The court interpreted the €10,000 management fee on a standalone monthly basis. It was waived if commission exceeded that figure in the same month. Quarterly commission reconciliation did not retrospectively remove fees otherwise payable for individual months. The contemporaneous wording and billing practice supported that interpretation.

The Textron compensation claim

ACASS delayed submitting a compensation claim concerning maintenance-related downtime. However, Textron rejected the claim because it disputed entitlement, not because notification was late. Amborella failed to prove the necessary causal link between ACASS’s delay and the lost compensation.

Handover during the notice period

The obligation to make the aircraft and records available arose “on termination”, not on service of termination notice. The agreement continued during the 60-day notice period, and ACASS retained its management responsibilities until expiry.

ACASS had no contractual lien permitting detention for unpaid fees. Nevertheless, the aircraft was returned within the contractual notice period. An earlier indication that a cooperative transfer might occur did not, on the evidence, alter the contractual termination date. The judgment expressly distinguished any hypothetical retention after that date.

The court also lacked evidence that LUMINAIR could have commenced operations immediately had it received the aircraft earlier. The handover damages claim therefore failed.

The remaining disputed account

ACASS’s original claim of €1,199,268 was reduced through direct payments, concessions and admissions. The court’s €147,131 award concerned the remaining disputed balance, rather than representing a determination that only that amount had ever been owed.

Because liability on the forecast claims was not established, the court did not determine the competing arguments about recoverable damages under those claims.

7. Significance and Likely Impact

A commercially important middle position

The judgment rejects two extremes: that every attached forecast guarantees performance, and that every prediction is legally meaningless. Its principal contribution is a clear application of established warranty and misrepresentation principles to a detailed contractual operating budget.

The reasoning is potentially relevant to business plans, projected investment returns, franchise estimates and other specialist commercial forecasts. Its application will depend on the wording, purpose, expertise and allocation of risk in each transaction.

Drafting implications

Parties should distinguish expressly between a guaranteed result, a target and an undertaking concerning forecasting methodology. If minimum revenue, maximum expenditure or a specified return is intended, the contract should identify the commitment, relevant assumptions, adjustment mechanisms and consequences of breach.

Labels such as “draft” or “forecast” are not complete answers. Schedule E retained those labels but still carried legal significance. Equally, attaching a document without explaining its relationship to payment and risk provisions invites disputes about incompatible obligations.

Evidence must address the original professional exercise

A successful challenge should ordinarily identify the information available when the forecast was prepared, the relevant professional standard, the material defect and its consequences. Comparing actual losses with projected profits is not enough.

The judgment also cautions against assuming that a successor operator’s profitability proves predecessor negligence. LUMINAIR’s model differed materially in fleet deployment, control, owner access and contractual guarantees. Comparisons must account for those differences.

Limits of the decision

The court’s observations about later conduct—including acceptance of revised budgets and the absence of contemporaneous warranty allegations—supported its assessment of the evidence. They should not be mistaken for a general rule that failure promptly to allege breach destroys an existing warranty.

Likewise, the absence of an identified industry guideline was important here, but the judgment should not be read as making a written professional standard indispensable in every negligence case. Its central requirement was convincing evidence of a material failure to exercise reasonable care.

Finally, the court’s concern about disproportionate litigation costs is significant. A ten-day hearing produced a relatively limited disputed recovery, while costs remained unresolved. The judgment underscores the commercial value of early account reconciliation and focused expert evidence.

8. Complex Concepts Simplified

Contractual warranty

A binding contractual promise. Its scope depends on what was promised: a particular result, or merely reasonable care in preparing an estimate.

Forecast versus guarantee

A forecast estimates what may happen on stated assumptions. A guarantee allocates responsibility if the specified outcome does not happen.

Negligent misrepresentation

A carelessly made representation that induces a contract and causes loss. A forecast may qualify through what it implies about its preparation and foundation.

Negligent misstatement and pure economic loss

A careless statement made in circumstances creating a duty of care, causing financial loss without accompanying personal injury or property damage.

Inducement

The representation helped cause the decision to contract. It need not have been the only reason.

Reverse burden under section 45

Once the statutory conditions are met, the representor must establish actual belief and reasonable grounds for believing the represented facts were true.

Causation

The required connection between a legal wrong and the claimed loss. Delay alone did not establish liability for Textron’s rejection of compensation.

Lien

A right to retain property as security for payment. ACASS had no contractual lien, although its contractual responsibilities continued throughout the notice period.

9. Conclusion

A forecast can be legally significant without guaranteeing its predicted result. Schedule E did not transfer the aircraft’s commercial operating risk to ACASS. It did, however, represent that ACASS had honestly and competently prepared an achievable professional forecast.

Amborella’s counterclaim failed because the evidence did not establish defective preparation, actionable misrepresentation or the other alleged breaches. The decision’s broader lesson is to separate outcome risk from professional responsibility—and to prove each alleged failure through the contractual wording and evidence relevant to it.