Choose the ownership task before filling in amounts
Identify exact propulsion, driven hardware, production configuration and the equipment needed for the owner’s family and route. State planned distance, holding period and receiving location, retaining changes expected during that period. The PHEV versus EV review addresses suitability before a cost preference is calculated. A three-year period is a worksheet boundary, not a recommendation that every buyer dispose of a vehicle then. Compare the same required use or clearly label the differences. Essential registration, charging and service suitability remain acceptance gates: a smaller projected total cannot make an unsupported configuration useful merely by omitting the work or access it requires.
Carry the complete accepted acquisition boundary forward
Start with the dated landed-cost worksheet, including understood preparation, logistics and applicable receiving expenditure. Retain quotation source, currency, validity, inclusions and exclusions for each line. Obtain appropriate local advice for destination costs rather than applying a universal estimate. Keep refundable items and financing schedules identifiable so the same purchase amount is not counted twice. Where uncertainty remains, use a labelled alternative instead of presenting a precise total as settled. A seller asking amount cannot be compared with another vehicle’s ready-to-use cost. The worksheet should show the owner what must be paid to obtain the accepted configuration before recurring expenditure begins.
Use the energy arrangement available to this owner
Estimate distance and energy using credible ordinary routes, load and climate assumptions. Keep bought electricity, public-session fees and relevant fuel expenditure separate for the PHEV; retain a compatible charging-access plan for the EV. The PHEV and EV energy comparison provides the consistent measurement boundary. Assign installation and one-time equipment to setup rather than counting them again as recurring energy. Do not take full brochure range as guaranteed daily electric travel or compare unlike cycles as measured owner consumption. Label unmeasured planning inputs and state when actual records should replace them. Charging availability can alter both cash expenditure and practicality, so it must remain visible beside the estimated bill.
Use care instructions and actual receiving scope
Collect applicable maintenance instructions for the offered configuration and quotations from usable providers. The maintenance and parts guide separates routine operations from specialist support, while the arrival and first-service review addresses the accepted starting condition. Include relevant tyres, brakes, auxiliary-battery care or other planned work when instructions or evidence support it; do not invent replacement intervals. Keep insurance, parking and other local expenditure on a consistent basis with the alternative. Distinguish quoted work from a contingency allowance. A buffer is a planning choice, not proof a named component will fail or a promise that every consequential repair can be completed within that amount.
Label disposal value instead of inventing a forecast
If an end-of-period receipt is part of the comparison, state its basis and test a less favourable assumption. A current asking price elsewhere is not a confirmed resale amount for this buyer’s future market. Include disposal expenditure consistently where relevant. The higher-trim review keeps working equipment benefits distinct from a speculative premium at sale. A simple period comparison can combine accepted acquisition and operating outlays, then subtract an explicitly assumed disposal receipt. It is not an appraisal or investment return. Do not make the more expensive candidate appear guaranteed cheaper by selecting an optimistic resale figure that does not have an accountable supporting boundary.
Find the assumption that can reverse the purchase choice
Test distance, charging access, energy prices, defined work and disposal assumptions separately before combining a plausible adverse case. State which change reverses the preference. The four-wheel-drive premium review keeps a useful route benefit separate from automatic financial recovery. If an unresolved consequential condition dominates the result, obtain better evidence or select another supported offer rather than adding precision to guessed amounts. Record preparation and exclusions in the purchase equipment schedule. Refresh after a changed VIN, quotation, household routine or destination. The useful outcome is a transparent decision with conditions, not an apparently exact number that conceals every uncertain future input.
DECISION CONDITIONS
Compare the accepted purchase routes
- Useful comparison
- Matched candidates and consistent cost boundaries support a reviewable ownership decision.
- Assumption-sensitive
- Charging, preparation or disposal uncertainty changes the preferred offer.
- More evidence
- A consequential unknown needs information or another candidate before commitment.
BUYER FILE
Evidence to retain
- State exact propulsion and intended holding period.
- Use complete accepted acquisition expenditure.
- Separate purchased energy and setup.
- Retain applicable care and usable provider quotations.
- Test labelled contingency and disposal assumptions.
QUESTIONS
Close the relevant uncertainty
Does this worksheet guarantee three-year Tai 7 expenditure?
No. It compares recorded quotations and labelled future assumptions for a stated owner and task.
Can uncertain resale establish a guaranteed payback for higher equipment?
No. Keep disposal assumptions explicit and separate from current useful benefits.