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Business Case Template (Five-Case Model)

Investment business case: strategic, economic, commercial, financial and management cases, options, NPV/IRR, risks, approvals

ビジネスフルFive-case model (public business case concept)casemath

使い方: Use when seeking approval and funding for an investment. Write the strategic case and investment objectives first, then appraise options against a do-nothing baseline. The main pitfall is a case with only one real option or untraceable numbers.

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Business Case: [Initiative name]

Full business case for an investment decision, structured around the five-case model concepts: strategic, economic, commercial, financial and management. It sets out why change is needed, which option offers the best value, whether it can be bought and afforded, and how it will be delivered. Replace every [bracketed] value and every row marked Example. This is a document format, not financial advice: have your finance team validate every figure and discount rate.

Document control

FieldValue
Document ID[BC-YYYY-001]
Initiative[Initiative name]
Stage[Strategic outline / Outline business case / Full business case]
Version[0.1]
Status[Draft / In review / Approved / Rejected / Deferred]
Senior responsible owner[@sponsor]
Author(s)[@author]
Finance reviewer[@finance]
Investment requested[currency amount, capital and operating]
Decision forum[Investment committee / Board / Steering group]
Last updatedYYYY-MM-DD

Approvals

RoleNameDecisionDateConditions
Senior responsible owner[@name][Endorsed / Not endorsed]YYYY-MM-DD[Any conditions]
Chief financial officer[@name][Approved / Changes requested]YYYY-MM-DD[Conditions]
Investment committee chair[@name][Approved / Rejected / Deferred]YYYY-MM-DD[Conditions]
Head of procurement[@name][Commercial route agreed]YYYY-MM-DD[Conditions]

Revision history

VersionDateAuthorChange summary
0.1YYYY-MM-DD[@name]First draft of strategic case and long list
0.2YYYY-MM-DD[@name]Example: Added economic appraisal for three short-listed options
1.0YYYY-MM-DD[@name]Example: Approved by investment committee with conditions

Contents

1. Executive summary

[Initiative name] addresses [problem in one sentence]. We assessed [N] options against a do-nothing baseline. The preferred option is [option name], which costs [amount] over [N] years and delivers a net present value of [amount] with a payback period of [N] years.

ItemSummary
Decision requested[Approve funding of amount for phase 1 / proceed to full business case]
Preferred option[Option name and one-line description]
Total cost (whole life)[amount over N years, undiscounted]
Net present value[amount at r% discount rate]
Internal rate of return[N%]
Payback period[N years, N months]
Key benefits[Top three benefits with measures]
Key risks[Top two risks and their mitigation]
Delivery timeline[Start date to completion date]

Example: "Replacing the legacy order management system reduces order handling cost by 32% and removes an unsupported platform that carries an estimated 18% annual probability of a major outage. Option 3 (SaaS platform with phased migration) costs 2.4M over five years and returns an NPV of 1.1M at an 8% discount rate."

2. Strategic case

2.1 Organisational overview and strategic context

[Describe the organisation or business unit, its strategy, and the objectives this initiative supports. Reference the plan by name and year, for example "Operations Strategy 2026-2029, objective 3: reduce cost to serve".]

2.2 Case for change

AspectCurrent stateProblem or constraintEvidence
Example: ProcessOrders keyed manually from email into two systems11 minutes average handling time; 4.2% rekey error rateProcess audit, March YYYY
Example: TechnologyOrder platform out of vendor support since YYYYNo security patches; outage riskVendor notice, IT risk register R-014
[Aspect][Current state][Problem][Source]

2.3 Investment objectives

IDObjectiveMeasureBaselineTargetBy when
IO-01Example: Reduce order handling costCost per order6.404.35Q4 YYYY
IO-02Example: Remove unsupported platform riskCritical systems out of support10Q2 YYYY
IO-03[Objective][Measure][Baseline][Target][Date]

2.4 Scope, constraints and dependencies

[State the minimum, intermediate and maximum scope considered. List constraints such as budget ceilings, regulatory deadlines or freeze periods, and dependencies on other programmes.]

  • Constraints: [for example, capital budget capped at amount in FY YYYY]
  • Dependencies: [for example, identity platform upgrade completes by YYYY-MM-DD]
  • Stakeholders: [who is affected and who must agree]

3. Options appraisal

3.1 Long list

IDOptionDescriptionMeets objectives?Result
OP-0Do nothingContinue current arrangementsNoBaseline (carried forward)
OP-1Example: Do minimumExtend vendor support, patch critical issuesPartiallyCarried forward
OP-2Example: Build in houseDevelop a new platform internallyYesDiscounted: skills gap, 30-month timeline
OP-3Example: SaaS with phased migrationSubscribe to a SaaS platform; migrate by regionYesCarried forward (preferred)
OP-4Example: SaaS big-bang migrationSame platform, single cut-overYesCarried forward

3.2 Critical success factors

IDCritical success factorHow it is assessed
CSF-1Strategic fitContribution to IO-01 to IO-03
CSF-2Value for moneyNPV and benefit-cost ratio
CSF-3AchievabilitySkills, timeline and supplier capacity
CSF-4AffordabilityFits within capital and operating budgets

3.3 Short list

OptionCSF-1CSF-2CSF-3CSF-4Overall
OP-0 Do nothingLown/a (baseline)HighHighBaseline
OP-1 Do minimumLowLowHighHighNot preferred
OP-3 SaaS phasedHighHighMediumMediumPreferred
OP-4 SaaS big-bangHighMediumLowMediumPossible

4. Economic case

4.1 Appraisal method

Each option is appraised over [N] years at a discount rate of [r%] agreed with finance. Net present value (NPV) discounts each year's net cash flow CFtCF_t back to today and subtracts the initial investment C0C_0:

NPV=∑t=1TCFt(1+r)t−C0NPV = \sum_{t=1}^{T} \frac{CF_t}{(1+r)^t} - C_0

The internal rate of return (IRR) is the discount rate at which NPV is zero. Payback is the time until cumulative net cash flow turns positive. The benefit-cost ratio is the present value of benefits divided by the present value of costs.

4.2 Costs by option

Cost lineOP-1 Do minimumOP-3 SaaS phasedOP-4 SaaS big-bang
Example: Initial investment C0C_0150,000900,000780,000
Example: Annual licences and support210,000260,000260,000
Example: Internal staff (annual)340,000180,000180,000
[Cost line][amount][amount][amount]
Whole-life cost (5 years, undiscounted)[total][total][total]

4.3 Benefits by option

IDBenefitTypeMeasureAnnual value (OP-3)Owner
BN-01Example: Lower order handling effortCash-releasingCost per order 6.40 to 4.35615,000@ops-director
BN-02Example: Avoided outage costRisk reductionExpected loss avoided90,000@cio
BN-03Example: Faster quote turnaroundQualitativeDays from request to quoteNot monetised@sales-director

4.4 Results

MeasureOP-1OP-3OP-4
NPV at [r%][amount][amount][amount]
IRR[N%][N%][N%]
Payback[N years][N years][N years]
Benefit-cost ratio[N.N][N.N][N.N]

Example: With C0=900,000C_0 = 900{,}000, net annual cash flows of 525,000 for five years and r=8%r = 8\%, the present value of inflows is about 2,096,000, so NPV is about 1,196,000 and payback falls in year 2.

4.5 Sensitivity and switching values

[Show how the result changes when key assumptions move. A switching value is the change in one input that would make the preferred option no longer best.]

AssumptionBase valueTested rangeNPV at worst caseSwitching value
Example: Benefit realisation100%60% to 110%230,000Benefits fall below 54%
Example: Migration duration9 months9 to 15 months870,000Over 26 months

4.6 Assumptions register

IDAssumptionSourceConfidence
AS-01Example: Order volume grows 4% a yearSales forecast FY YYYYMedium
AS-02[Assumption][Source][High / Medium / Low]

5. Commercial case

5.1 Procurement strategy

[Describe the route to market: framework call-off, open tender, competitive negotiation, direct award with justification. State the evaluation approach and timeline.]

5.2 Required services and outputs

RequirementSpecification summaryContract type
Example: SaaS order platformMulti-region, 99.9% availability, EDI supportSubscription, 3 years plus 2
Example: Migration servicesData migration and integration buildFixed price with milestones

5.3 Risk allocation

RiskClientSupplierShared
Example: Platform availabilityX
Example: Data quality before migrationX
Example: Integration delaysX

5.4 Payment mechanism and key terms

[Summarise payment milestones, service credits, exit and data return provisions, and any personnel or asset transfer implications. Have the final terms reviewed by legal counsel.]

6. Financial case

6.1 Capital and revenue requirements

LineFY1FY2FY3FY4FY5Total
Capital[amount][amount][amount][amount][amount][total]
Operating[amount][amount][amount][amount][amount][total]
Savings released[amount][amount][amount][amount][amount][total]
Net impact[amount][amount][amount][amount][amount][total]

6.2 Funding sources

SourceAmountStatusConditions
Example: Capital programme FY YYYY900,000AllocatedRelease on approval of full case
Example: Operating budget, IT260,000 per yearRequestedOffset by decommissioning legacy licences

6.3 Affordability gap and impact on accounts

[State any gap between required and available funding and how it will be closed. Describe the expected effect on the income statement and balance sheet, such as capitalised implementation costs and depreciation, as confirmed by finance.]

7. Management case

7.1 Delivery plan

PhaseKey deliverablesStartEndGate
Example: MobiliseSupplier contract signed, team in placeYYYY-MM-DDYYYY-MM-DDGate 1
Example: Region 1 migrationFirst region live, legacy read-onlyYYYY-MM-DDYYYY-MM-DDGate 2
Example: Full roll-out and decommissionAll regions live, legacy switched offYYYY-MM-DDYYYY-MM-DDGate 3

7.2 Governance

[Describe the governance structure: senior responsible owner, steering group, project board, design authority, reporting frequency and tolerances that trigger escalation, such as a cost overrun over 10% or a delay over four weeks.]

RoleNameResponsibility
Senior responsible owner[@name]Accountable for benefits and the case
Project manager[@name]Day-to-day delivery within tolerances
Benefits owner[@name]Tracks and reports benefits after go-live

7.3 Benefits realisation

Benefit IDMeasureBaselineTargetMeasurement dateOwner
BN-01Cost per order6.404.35YYYY-MM-DD[@name]
BN-02Critical systems out of support10YYYY-MM-DD[@name]

7.4 Change management, assurance and post-implementation review

[Explain the training, communication and process-change plan. Describe independent assurance points and when a post-implementation review will compare actual costs and benefits with this case.]

8. Risks

Score each risk as likelihood times impact on a 1 to 5 scale, so Score=L×IScore = L \times I ranges from 1 to 25.

IDRiskLIScoreMitigationOwner
RK-01Example: Legacy data quality delays migration4416Data cleansing sprint before Gate 2@data-lead
RK-02Example: Staff adoption lower than planned3412Super-user network, phased training@ops-director
RK-03[Risk][1-5][1-5][L x I][Mitigation][@owner]

9. Recommendation

It is recommended that [decision forum] approves [option] at a total cost of [amount], with phase 1 funding of [amount] released now and the remainder subject to Gate [N] review on YYYY-MM-DD.

  • Conditions: [for example, supplier contract signed within budget]
  • Next steps: [for example, issue tender by YYYY-MM-DD]

10. Appendices

  • Appendix A: Economic model workbook [link]
  • Appendix B: Long-list assessment detail [link]
  • Appendix C: Stakeholder consultation summary [link]
  • Appendix D: Glossary of terms such as NPV, IRR, payback and switching value

Standard and licence note

Based on common business case practice using the publicly described five-case model concepts (strategic, economic, commercial, financial and management). This template is original text written for this collection and reproduces no text from any official guidance; consult your organisation's investment appraisal rules for mandatory content. This is a document format, not financial advice. Template licence: MIT.

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