Minimum Project Fee Planner methodology

minimumProjectFee = project cost ÷ (1 − target margin)

totalInternalHours = sales + onboarding + admin + delivery hours

labourCost = total internal hours × loaded cost

overheadAmount = (labour cost + direct costs) × overhead rate

projectCost = labour cost + direct costs + overhead

targetContribution = minimum project fee − project cost

minimumEffectiveRate = minimum project fee ÷ total internal hours

deliveryHourEffectiveRate = minimum project fee ÷ delivery hours

Money inputs and outputs use the currency selected in the scenario without changing the canonical methodology. Rates, margins, utilisation and buffers are entered as percentages and converted to decimal values for calculation.

• Inputs must be finite and remain within the visible boundaries.
• Rates are decimal values and all monetary inputs use one consistent currency and period.
• Whole operational capacity is rounded only where the engine explicitly applies floor or ceiling.

Sales hours minimum

salesHours ≥ 0 hours/project — A lower value is rejected before calculation.

Sales hours maximum

salesHours ≤ 10,000,000 hours/project — A higher value is rejected before calculation.

Onboarding and setup hours minimum

onboardingHours ≥ 0 hours/project — A lower value is rejected before calculation.

Onboarding and setup hours maximum

onboardingHours ≤ 10,000,000 hours/project — A higher value is rejected before calculation.

Administration hours minimum

adminHours ≥ 0 hours/project — A lower value is rejected before calculation.

Administration hours maximum

adminHours ≤ 10,000,000 hours/project — A higher value is rejected before calculation.

Delivery hours minimum

deliveryHours ≥ 0 hours/project — A lower value is rejected before calculation.

Delivery hours maximum

deliveryHours ≤ 10,000,000 hours/project — A higher value is rejected before calculation.

Loaded cost per hour minimum

loadedCostPerHour ≥ 0 currency units/hour — A lower value is rejected before calculation.

Loaded cost per hour maximum

loadedCostPerHour ≤ 10,000,000 currency units/hour — A higher value is rejected before calculation.

Direct costs minimum

directCosts ≥ 0 currency units/project — A lower value is rejected before calculation.

Direct costs maximum

directCosts ≤ 10,000,000 currency units/project — A higher value is rejected before calculation.

Overhead rate minimum

overheadRate ≥ 0 proportion of labour cost allocated as overhead — A lower value is rejected before calculation.

Overhead rate maximum

overheadRate ≤ 0.99 proportion of labour cost allocated as overhead — A higher value is rejected before calculation.

Target margin minimum

targetMargin ≥ 0 proportion of project fee retained as contribution — A lower value is rejected before calculation.

Target margin maximum

targetMargin ≤ 0.99 proportion of project fee retained as contribution — A higher value is rejected before calculation.

• All costs, prices, hours, probabilities and volumes are user-supplied; no market benchmark is inferred.
• Tax is outside these neutral commercial comparisons.
• The engine retains full precision; formatting never feeds back into calculation.

This planner has no current policy-data dependency. Its commercial assumptions are user supplied. Registered family-level regression suites exercise the shared business-logic engine and worked-result reconciliation.

• The model does not predict demand, delivery performance, contract enforceability or customer behaviour.
• It does not replace accounting, tax, legal or financial advice.

This is educational decision support, not tax, accounting, legal or financial advice. Check the treatment of your actual transactions under the rules that apply to your business and seek qualified advice where appropriate.

Registered family-level suites test formula invariants and example reconciliation; the release ledger records that coverage without claiming a separate oracle for every line of public copy. There is no official threshold or benchmark to refresh for this planner. Commercial inputs remain user-supplied because they vary by business and contract.

1. 2026-07-31: Initial public release of the planner and methodology after pre-launch calculation, content, source and interaction review.