Math
Is It Better to Use a Percentage Discount or a Fixed Dollar Voucher? Let's Do the Math
Use break-even analysis to choose discount types confidently.
Understand the break-even point
When you have both a percentage discount and a fixed-value voucher available for the same purchase, choosing the right one requires a simple calculation. The break-even point is the basket value at which both discounts deliver exactly the same saving. The formula is straightforward: divide the fixed voucher value by the percentage rate expressed as a decimal. For example, if you have a five-euro fixed voucher and a ten-percent discount, the break-even basket is five divided by 0.10, which equals fifty euros. At exactly fifty euros, both options save you five euros. Below fifty euros, the fixed voucher saves more. Above fifty euros, the percentage discount saves more. This calculation takes seconds and eliminates guesswork. Before checkout, estimate your basket total, compare it to the break-even point, and choose accordingly. Write the break-even value on the voucher itself or in your notes so you do not need to recalculate each time.Practical scenarios for each voucher type
In practice, fixed-value vouchers tend to win on smaller, focused shopping trips—a midweek top-up, a single-category shop, or a quick convenience run where the basket total stays below the break-even point. Percentage discounts tend to win on larger basket shops—the weekly family grocery run, a seasonal stock-up, or a combined essentials trip where the basket total comfortably exceeds the break-even. Knowing this pattern helps you plan which voucher to use on which trip. Save your percentage discount for your big weekly shop and use your fixed voucher on a smaller midweek run. This allocation maximises the total saving across both trips rather than using whichever voucher you find first. Some shoppers go further and deliberately split their shopping into two trips—one small, one large—specifically to exploit both voucher types optimally.Always check caps, minimums, and exclusions
The break-even calculation assumes both vouchers apply without restrictions, but real-world vouchers almost always have conditions. A twenty-percent discount might be capped at a maximum saving of ten euros, effectively converting it into a fixed voucher once your basket exceeds fifty euros. A fixed voucher might require a minimum spend of thirty euros, below which it cannot be used at all. Exclusions—certain brands, categories, or promotional items removed from the discount—reduce the effective basket value that the voucher applies to, shifting the break-even point. Before applying the break-even formula, read the full terms of both vouchers and adjust your calculation accordingly. A percentage discount capped at eight euros with a forty-euro minimum and product exclusions is functionally very different from an uncapped, unrestricted twenty-percent discount, even though the headline rate is the same.Continue in your Voucher Dashboard.