Question 1

How accurate is this break-even calculator?

Accepted Answer

This calculator provides a financial forecast based on the inputs you provide. Its accuracy is high for the variables it considers (fuel, incentives, maintenance). However, it assumes these costs remain constant over the payback period. In reality, fuel and electricity prices fluctuate. It's best used as a strong directional guide for financial planning.

Question 2

Does this calculator include incentives and maintenance?

Accepted Answer

Yes. This tool now allows you to input any upfront government grants or tax credits, which directly reduces the initial price gap. It also automatically factors in average annual maintenance savings for an EV (£300/year for UK, $450/year for US) compared to a petrol car, making the payback calculation more comprehensive.

Question 3

What is the 'break-even' point?

Accepted Answer

The break-even or 'payback' point is the moment in time when the total savings from running an EV (cheaper electricity, lower maintenance) have fully covered the initial higher purchase price of the car, after accounting for any grants. After this point, every mile you drive is saving you money compared to the petrol alternative.

Question 4

How does annual mileage affect the payback period?

Accepted Answer

Annual mileage is one of the most significant factors. The more you drive, the faster you accumulate fuel and maintenance savings, and therefore the shorter your break-even period will be. High-mileage drivers often find that an EV pays for itself very quickly.

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EV vs Petrol: Break-Even Calculator

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