I Tested Sainsbury's Cheapest & Priciest Laundry Detergent: The Results
Cheapest vs Priciest Laundry Detergent Test Results

In an era of tightening household budgets, every penny counts. This led one lifestyle reporter to conduct a practical experiment: does splashing out on premium laundry detergent truly yield better results than the most budget-friendly option? Sophie Harris, a Senior Lifestyle Reporter, put this to the test in January 2026, comparing the cheapest and most expensive detergents on the shelf at her local Sainsbury's.

The Budget-Friendly Contender: Sainsbury's Own-Brand Pods

For the value option, Harris selected Sainsbury's non-bio laundry capsules for sensitive skin. Priced at a mere £3.28 for 25 washes, it was the clear winner on cost. The product has moved to a new, more concentrated formula and now comes in eco-friendly cardboard packaging, a step away from plastic.

However, the reporter noted a minor struggle opening the box. After using the pods for approximately five loads of laundry, she found her clothes were clean but lacked any lasting fragrance, despite the pods themselves having a fresh scent.

A key point of contention was the capsule size. Sainsbury's attributes the smaller pod to increased concentration, but Harris felt one capsule was insufficient for her typical laundry loads, casting doubt on the claimed wash count.

The Premium Challenge: Persil's 3-in-1 Capsules

On the opposite end of the spectrum stood Persil's 3-in-1 non-bio capsules, commanding a price of £8.50 for 36 washes. The performance gap was immediately noticeable.

Harris reported that just one of these larger capsules was effective, even on heavily stained items. The wash left clothes with a pleasant scent and no sticky residue, and she was able to achieve excellent results at an energy-saving 30°C.

An added bonus was the brightening effect on white garments, eliminating the perceived need for a separate fabric softener. The packaging is fully recyclable, though securing the lid after use proved slightly tricky.

The Verdict: Is Expensive Always Better?

The differences between the two products were stark. While the Sainsbury's pods performed their basic function of cleaning at a very low cost, they fell short on fragrance and perceived power.

In contrast, the Persil capsules delivered a comprehensive wash experience. Harris was extremely impressed, concluding that this was a clear case of you get what you pay for. She hailed them as the best pods she's used and stated a definite intention to repurchase, despite the higher upfront cost.

This test highlights a classic consumer dilemma: outright cost versus cost-per-wash and performance. For those prioritising budget, the own-brand option works. But for those seeking superior cleaning, scent, and the convenience of a 3-in-1 product, the investment in a premium brand like Persil may prove more economical and satisfying in the long run.