Discount Volume discount is given based on the basic monthly fee (sub total 1). The more test you purchase, the higher volume discount you may get. Basic Monthly Fee (sub total 1) Volume Discount < GBP £20.00 - >= GBP £20.00 5% >= GBP £50.00 10% >= GBP £100.00 15% >= GBP £250.00 20% >= GBP £500.00 25% >= GBP £1000.00 30% >= GBP £2500.00 35% >= GBP £5000.00 40% Contractual discount is given if you prepaid for a longer period. Contract Period Contractual Discount Monthly - Quarterly 5% Half-yearly 10% Yearly 15% Multiple discounts will be applied concurrently if you fulfilled each condition.