A Keto Meal Plan for Under £40 a Week

The ketogenic diet is often perceived as expensive, but with careful planning, it’s possible to eat well for less. This meal plan uses affordable UK supermarket staples while keeping carbohydrates low enough to maintain ketosis. The key is prioritising whole foods over processed keto products.

How the maths works

At £40 for seven days, you have £5.71 per day or £1.90 per meal. A 2013 meta-analysis found very-low-carbohydrate diets effective for weight loss regardless of food budget (Bueno et al., 2013). Focus on eggs, frozen vegetables, and cheaper cuts of meat like chicken thighs (£3.50/kg at Aldi) rather than steak or salmon.

What this means in practice

Tesco’s everyday value range provides double cream (300ml for £1.10), cheddar (£2.25 for 400g), and whole chickens (£3.50 each). Seasonal UK vegetables like cabbage (50p/head in winter) and cauliflower (£1 in autumn) keep costs down. Batch cooking reduces energy bills – roast two chickens at once for lunches and stocks.

Sample day under £5.71

• Breakfast: 3 scrambled eggs with 30g cheddar (60p)
• Lunch: Chicken leg with roasted Brussels sprouts (£1.20)
• Dinner: Minced beef chilli with cauliflower rice (£2.30)
• Snacks: 30g peanuts, tea with cream (60p)

This provides 150g protein, 20g net carbs, and fits the 75% fat keto macro ratio without specialty ingredients.

Shopping list priorities

1. Proteins: Eggs (£1.20/dozen), chicken thighs, minced beef (5% fat, £3/kg) 2. Fats: Butter (£1.60/250g), vegetable oils, cream 3. Vegetables: Frozen spinach (85p/500g), fresh when on offer 4. Extras: Stock cubes, salt, basic spices

Avoid pre-grated cheese, pre-cut vegetables, and branded products. A 2019 study showed metabolic benefits from carbohydrate restriction weren’t dependent on organic or premium ingredients (Hyde et al., 2019).

Frequently asked questions

Can I do keto cheaply as a vegetarian?

Yes, focus on eggs, full-fat dairy, and tofu. A block of firm tofu costs £1.50 at Sainsbury’s and provides 40g protein. Supplement with nuts and seeds in moderation.

Are canned fish keto-friendly?

Absolutely. Sardines (55p/tin at Lidl) provide omega-3s and protein. Drain the oil to control calories if needed.

How do I avoid nutrient deficiencies?

Eat liver once weekly (85p/400g at Asda) for vitamins A and B12. Frozen spinach provides magnesium and potassium to prevent common keto electrolyte imbalances.

The bottom line

A ketogenic diet needn’t break the bank when you prioritise whole foods and seasonal produce. This £40 plan proves you can maintain nutritional ketosis while spending less than the UK average food budget. If you’d rather not do the macro maths yourself, the Keto Dieting app does it for you on Google Play and the App Store.

References

1. Bueno NB, de Melo IS, de Oliveira SL, da Rocha Ataide T (2013). Very-low-carbohydrate ketogenic diet v. low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials. British Journal of Nutrition. https://doi.org/10.1017/S0007114513000548
2. Hyde PN, Sapper TN, Crabtree CD, et al. (2019). Dietary carbohydrate restriction improves metabolic syndrome independent of weight loss. JCI Insight. https://doi.org/10.1172/jci.insight.128308