Cheapest Frozen Fish in the UK

Prices updated 15 August 2026 · 208 products across 7 supermarkets

The best-value frozen fish in the UK right now is Stamford Street Co. White Fish Steaks x6 520g at Sainsbury's — £1.20/kg (£3.75).

208Products Compared

7Supermarkets

£1.20Lowest /Kg

We compare frozen fish across all 7 major UK supermarkets — Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S — and rank by price per unit so you can see where frozen fish is genuinely cheapest. Prices update daily.

#	Product	Store	Price	Per Unit
1	Stamford Street Co. White Fish Steaks x6 520g	Sainsbury's	£3.75	£1.20/kg
2	THE FISHMONGER Breaded Cod 4 Pack 0.5 KG	Aldi	£3.69	£1.84/kg
3	THE FISHMONGER Battered Cod 4 Pack 0.5 KG	Aldi	£3.69	£1.84/kg
4	THE FISHMONGER Battered Haddock 4 Pack 0.5 KG	Aldi	£3.69	£1.84/kg
5	THE FISHMONGER Chunky Breaded Cod 4 Pack 0.5 KG	Aldi	£4.89	£2.44/kg
6	THE FISHMONGER Chunky Battered Cod 4 Pack 0.5 KG	Aldi	£4.89	£2.44/kg
7	Young's Fish Steaks in a Creamy Parsley Sauce x4 560g	Sainsbury's	£6.50	£2.90/kg
8	Young's Chip Shop Omega 3 Fish Fillets x4 400g	Sainsbury's	£5.10	£3.19/kg
9	THE FISHMONGER Fish Steaks in a Butter Sauce 2 Pack 0.28 KG	Aldi	£1.99	£3.55/kg
10	THE FISHMONGER Fish Steaks in a Parsley Sauce 2 Pack 0.28 KG	Aldi	£1.99	£3.55/kg
11	THE FISHMONGER Fish Steaks in a Cheese & Spinach Sauce 2 Pack 0.28 KG	Aldi	£1.99	£3.55/kg
12	Birds Eye Battered Cod Fillets x4 400g	Sainsbury's	£6.95	£4.34/kg
13	Birds Eye Breaded Cod Fillets x4 400g Nectar £5.50	Sainsbury's	£6.95	£4.34/kg
14	Birds Eye Battered Haddock Fillets x4 400g	Sainsbury's	£6.95	£4.34/kg
15	Birds Eye Breaded Haddock Fillets x4 400g Nectar £5.50	Sainsbury's	£6.95	£4.34/kg
16	Stamford Street Co. White Fish Fillets 520g	Sainsbury's	£2.28	£4.38/kg
17	Morrisons Savers Fish Fillets 520g	Morrisons	£2.28	£4.38/kg
18	EVERYDAY ESSENTIALS White Fish Fillets 1kg 1 KG	Aldi	£4.39	£4.39/kg
19	JUST ESSENTIALS by ASDA Just Essentials by White Fish Fillets 520g	Asda	£2.30	£4.42/kg
20	Bay Fishmongers White Fish Fillets 520G	Tesco	£2.30	£4.42/kg
21	THE FISHMONGER Extra Crunchy Gourmet Fish Fillet 0.4 KG	Aldi	£1.79	£4.47/kg
22	THE FISHMONGER Skinless & Boneless Basa Fillets 0.38 KG	Aldi	£1.79	£4.71/kg
23	THE FISHMONGER Lemon & Herb Tempura Basa Fillets 2 Pack 0.31 KG	Aldi	£2.99	£4.82/kg
24	THE FISHMONGER Salt & Pepper Dusted Basa Fillets 2 Pack 0.31 KG	Aldi	£2.99	£4.82/kg

See The Live Frozen Fish Comparison →

Cheapest Frozen Fish: FAQ

Where is the cheapest frozen fish in the UK?

Right now the best value frozen fish is Stamford Street Co. White Fish Steaks x6 520g at Sainsbury's, £3.75 (£1.20/kg). SmartShelf ranks frozen fish by price per unit across 7 supermarkets, updated daily.

Which supermarket is cheapest for frozen fish?

We compare frozen fish across Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S. Today Sainsbury's has the cheapest option, but the ranking updates every day as prices change.

How does SmartShelf compare frozen fish prices?

We list each product's price per unit (£/kg, £/litre or per item) so you compare like for like, and we show loyalty prices such as Clubcard and Nectar where available — free, with no sign-up.