Coupons are checked against the cart total calculated by Koovira, not a figure shown on screen, so the discount you are offered is the one that will actually be applied at checkout. A percentage coupon may also have a maximum discount, so a larger order does not always mean a larger saving. Per-person limits are counted per Koovira account. Separately, earned Koovira Credits are capped per order at whichever is lower: 15% of the bill, or Rs 25.