How to use the free delivery check

The calculator compares the total if you pay delivery now with the total if you add enough to reach the free delivery threshold. It also checks a planned extra item if you are thinking of adding one.

Estimate only: delivery thresholds can exclude marketplace sellers, subscriptions, restricted items, vouchers, collection orders or some locations.

Spend needed

If the spend needed is less than the delivery fee, topping up exactly could cost less than paying delivery.

Extra item trap

An extra item that costs more than the delivery fee may still increase your total, even if delivery becomes free.

Basket exclusions

Some retailers calculate free delivery after discounts or exclude certain products, so check the checkout total before ordering.

When topping up makes sense

A free delivery threshold is only a saving when the extra spend is lower than the delivery charge, or when the extra item is something you already planned to buy. If you spend £4 more to avoid a £5 delivery fee, the basket is cheaper by £1. If you spend £12 more to avoid the same fee, the order costs £7 more overall.

The calculator separates the spend needed, the delivery fee avoided and the optional extra item. That makes it easier to tell the difference between a real saving and a basket that only feels cheaper because the delivery line disappears.

Check the threshold basis

Some shops calculate free delivery before discounts, while others use the final basket after vouchers. Marketplace sellers, heavy items, age-restricted products and remote postcodes can also be excluded.

Use planned purchases first

The cleanest top-up is an item you would buy anyway, such as household basics, pet food, toiletries or pantry items with a long shelf life.

Compare collection options

Click and collect, slower delivery or subscription delivery can change the fee. Use the fee that applies to the checkout option you are actually considering.

Questions to ask before adding more

Would you buy the extra item without the threshold? Can it be returned if the main order changes? Does it expire, need storage, or create clutter? Is there a cheaper delivery slot, collection option or subscription pass? These questions matter because free delivery is only a saving when the extra spend has real value to you.

Retailers can also change thresholds by postcode, seller, basket category or delivery speed. Treat the calculator as a pre-check, then confirm the exact final total in checkout before paying.

Worked free delivery examples

If your basket is £36, delivery is £4.99 and free delivery starts at £40, adding a useful £4 item can reduce the total by about £0.99 compared with paying delivery. If the only useful top-up is £9, the order costs more overall even though the delivery line disappears.

For subscriptions, groceries and household basics, it can be sensible to top up with something you already buy regularly. For impulse purchases, low-quality accessories or short-date food, the free delivery threshold can quietly increase spend rather than save money.