The Cheapest Way to Eat Enough Protein

Protein has a reputation as the pricey macronutrient, the reason a healthy shop feels like a luxury. That reputation comes almost entirely from lean chicken breast, fresh fish fillets, and branded protein bars. Step past those and the picture flips completely. The cheapest sources of protein on the shelf are some of the cheapest foods full stop: dried lentils, eggs, tinned fish, milk, oats, and frozen soya beans. This is a guide to buying protein by the gram instead of by the label, so you can comfortably hit a proper daily target on a tight budget.

The short version

The amount of protein that helps you build and keep muscle is around 1.6 grams per kilogram of body weight, roughly 100 to 130 grams a day for most adults.
The cheapest protein on the shelf is almost always dried lentils, beans, eggs, milk, oats, and tinned fish, not fresh meat or fillets.
Judge foods by cost per gram of protein, not price per pack. A cheap-looking snack can be terrible value once you count the actual protein.
A full day near your target can cost roughly the price of a coffee using these staples.
You do not need protein powder to eat enough. It is a convenience, not a requirement.

Know the number you are aiming for

Before you save money, you need to know how much protein you are actually buying. A large 2018 review pooling 49 studies found that protein helps build and keep muscle up to around 1.6 grams per kilogram of body weight per day, after which extra protein adds little for the average person. For someone weighing 70 kilograms, that is about 112 grams a day.

That is the target this guide aims at. It sounds like a lot until you realise how much protein sits in ordinary cheap food. The trick is not eating more expensive things, it is choosing the staples that pack the most protein per penny.

Not training hard right now?

If you are sedentary and not trying to change your body, somewhere between 0.8 and 1.2 grams per kilogram is a comfortable zone. The cheap foods below still cover it easily, you just need less of them.

Price protein by the gram

The single most useful habit for cheap protein is to stop reading the price on the front and start working out the cost per gram of protein. Divide the pack price by the total grams of protein in the pack. A snack that looks cheap can be dreadful value, and a humble bag of dried lentils can be the best deal in the shop. The numbers below are approximate United Kingdom supermarket prices and will drift, but the order is remarkably stable wherever you shop.

Food	Protein per typical portion	Rough value
Dried lentils or split peas	about 18 g per cooked cup	Excellent, one of the cheapest per gram
Eggs	about 12 g per two large eggs	Excellent
Milk (dairy or fortified soya)	about 8 g per 250 ml	Excellent
Tinned fish (sardines, mackerel)	about 25 g per tin	Very good
Tinned beans and chickpeas	about 15 g per drained tin	Very good
Frozen soya beans (edamame)	about 11 g per 100 g	Very good
Own-brand oats	about 11 g per 100 g dry	Very good, plus fibre
Chicken thighs (cheaper than breast)	about 26 g per 100 g cooked	Good
Whey protein powder	about 24 g per scoop	Good, but a convenience buy
Protein bars	about 20 g per bar	Usually poor value per gram

The pricey trap

Branded bars, ready-made shakes, and lean fresh fillets are where protein gets expensive. They are fine as occasional convenience, but building your whole intake on them is the fast route to a big bill. The cheapest protein is nearly always the plainest food in the shop.

The cheap protein staples worth stocking

Dried and tinned pulses

Dried lentils, split peas, and beans are the outright value champions. Bought dry they cost very little per serving, keep for months, and deliver protein and a big dose of fibre in the same spoonful. Tinned versions cost a bit more but need no soaking and no planning, which makes them the easiest win for anyone short on time. Keep a few tins of chickpeas, kidney beans, and black beans in the cupboard as a default.

Eggs and dairy

Eggs are cheap, complete protein you can cook in five minutes. Milk, plain yoghurt, and cheaper cheeses stretch protein across breakfast and snacks without effort. If you avoid dairy, fortified soya milk matches cow's milk closely on protein, unlike most other plant milks, so check the label and pick soya where protein matters.

Tinned fish

Tinned sardines, mackerel, and pilchards are one of the best-kept secrets in budget nutrition: cheap, shelf-stable, high in protein, and rich in omega-3 fats. Tinned tuna is leaner and also good value. A tin on toast or stirred through pasta is a complete, cheap meal in minutes.

Soya, oats, and cheaper meat cuts

Frozen edamame, firm tofu, and textured soya mince are dense, complete plant proteins that cost far less than meat per gram and freeze or store well. Oats quietly add protein and fibre to breakfast. If you eat meat, the cheaper cuts, chicken thighs and drumsticks, whole chickens, and mince, carry as much protein as the pricey breast for a fraction of the price.

A full protein day for about the price of a coffee

Here is what a genuinely cheap, high-protein day looks like using only the staples above. It lands near 110 grams of protein, comfortably in the muscle-supporting range for many adults, and the ingredients cost roughly what you would pay for a single takeaway coffee.

Breakfast: oats with milk and yoghurt. Porridge made with soya or dairy milk, topped with a spoon of plain yoghurt. Around 20 grams of protein and plenty of fibre to start the day full.
Lunch: tinned fish on toast, or a lentil bowl. A tin of sardines or mackerel on wholemeal toast, or leftover lentils with rice. Around 25 to 30 grams.
Snack: two boiled eggs, or a glass of milk. Cheap, portable, and about 12 grams either way.
Dinner: bean and vegetable chilli or curry. A tin of beans plus lentils, tomatoes, and frozen veg over rice. Around 30 to 40 grams, and it makes enough for tomorrow's lunch too.

Cook once, eat twice

The cheapest protein day is usually a batch-cooked one. A big pot of lentil or bean stew costs pennies per serving and removes the temptation to buy an expensive convenience meal when you are tired. Make double, portion it, and your protein for the next two days is already sorted.

Cheap protein is naturally plant-heavy

One honest fact worth naming: the cheapest protein per gram is mostly plant based, because pulses, oats, and soya cost far less than animal foods. That is good news for your wallet whether or not you eat meat. Plant proteins are a little less dense and lower in the amino acid leucine, so if you build your day around them, eat slightly larger portions, roughly 10 to 20 percent more overall, and mix a few sources across the day.

You do not need to fuss over combining proteins at every meal. Soya foods like tofu, tempeh, and edamame are complete proteins on their own, and eating a variety of beans, lentils, grains, and nuts across a normal day covers all the amino acids you need. Cheap and plant based is not a compromise here, it is simply the most efficient way to buy protein.

Questions people ask

What is the single cheapest source of protein?

Dried lentils, split peas, and dried beans are usually the cheapest protein per gram in the shop. Bought dry they cost very little per serving, store for months, and add a large dose of fibre at the same time. Eggs and own-brand oats are close behind and need almost no preparation.

Do I need protein powder if I am on a budget?

No. Whole foods cover your needs entirely, and per gram of protein, plain foods like eggs, milk, lentils, and tinned fish are usually cheaper than powder anyway. A tub of basic whey can be reasonable value if you find shakes convenient, but it is a tool, not a requirement.

Is cheap protein worse for building muscle?

No. What builds muscle is hitting your total protein target across the day alongside training. Cheap sources like eggs, milk, soya, and pulses do that job just as well as expensive fillets and bars. Plant sources are slightly less protein-dense, so eat a little more of them and mix a few types.

How can vegans eat enough protein cheaply?

Lean on dried lentils and beans, tofu and soya mince, fortified soya milk, oats, peanut butter, and frozen edamame. These are among the cheapest foods in the shop and cover protein comfortably. Eat slightly larger portions than an omnivore would, since plant protein is a little less dense, and vary your sources across the day.

References

Morton RW, et al. British Journal of Sports Medicine. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. 2018. doi.org/10.1136/bjsports-2017-097608
Jager R, et al. Journal of the International Society of Sports Nutrition. International Society of Sports Nutrition Position Stand: Protein and Exercise. 2017. doi.org/10.1186/s12970-017-0177-8
Reynolds A, et al. The Lancet. Carbohydrate quality and human health: a series of systematic reviews and meta-analyses. 2019. doi.org/10.1016/S0140-6736(18)31809-9

Last reviewed 18 July 2026. We check health-condition articles against current guidelines and update the date above when we do.