Subscribe & Save: When Does It Beat the Store Price?

An online store lists 90 dishwasher tablets for $24.99, with 15% off if you subscribe. Your supermarket sells 62 tablets of the same brand for $14.99, and sometimes has them on sale for $12.99.

The subscription beats the supermarket’s regular price by about 2% — barely. When the supermarket runs its sale, the store is about 11% cheaper. A 15% discount sounds big, but it is 15% off a base price that started higher.

You subscribe to coffee with 15% off, delivered every 2 weeks. But one bag actually lasts you 3 weeks.

1. Over 12 weeks, you receive 6 bags but use only 4.
2. You pay for 6 bags at 85% of the price: 6 × 0.85 = 5.1 bags’ worth.
3. Spread over the 4 bags you used, that is 5.1 ÷ 4 ≈ 1.28 times the full price per bag.
4. Your “15% off” has turned into paying about 28% more per bag you actually use — until you skip deliveries or the surplus gets used up.

Set the delivery interval to your real usage. Count how long a pack lasts before you subscribe, and use the skip option when a delivery comes too early. Compare the subscription price per unit with your store in the calculator below.

Most programs take a percentage off the listed price for repeat deliveries, and some give a bigger percentage when several subscriptions ship together. The listed price itself can change between deliveries, so the discount is not a fixed price — check the price per unit before each delivery, not just when you sign up.

• Things you use at a steady, predictable rate: diapers, wipes, detergent, dishwasher tablets, pet food, coffee.
• Bulky items you would rather not carry home, where saving a trip has value to you.
• Products your local stores rarely discount.

They make less sense for items your supermarket puts on sale often, for anything perishable, and for things whose use varies a lot from month to month. For diapers, remember that babies move up a size; the cost per diaper calculator helps you compare packs as they do.

Online pack sizes often differ from store sizes — 90 tablets online vs. 62 in the store, 168 diapers vs. 128, 4 bottles vs. 1. Shelf prices can’t be compared, so convert both to a price per tablet, per diaper or per load. The cost per item calculator and the laundry detergent cost per load calculator open ready for this.

1. Work out the subscription price per unit, after the discount.
2. Compare it with your store’s regular and sale price per unit.
3. Measure how long one pack really lasts, and set the interval to match.
4. Note the price in your price book and re-check it every few deliveries.
5. Skip or pause deliveries when you have a surplus.

Online, a box of 168 diapers costs $49.99 with 5% off for subscribing. In store, a box of 128 of the same diapers costs $39.99.

1. Subscription: $49.99 × 0.95 ≈ $47.49 ÷ 168 ≈ $0.283 per diaper.
2. Store: $39.99 ÷ 128 ≈ $0.312 per diaper.
3. The subscription is about 10% cheaper per diaper — a real saving on something used every day.

Here the subscription wins because the online box is bigger and the base price is competitive. Re-check when your baby moves up a size: the counts and prices change.

The price you subscribed at isn’t guaranteed for later deliveries. Look at the order total when the reminder arrives, and compare the price per unit with your store price again every few months.

• Comparing the subscription price with a store’s package price instead of the price per unit.
• Assuming the discount locks in the price — the listed price can change before the next delivery.
• Leaving the default delivery interval instead of matching it to how fast you use the product.