Rethinking the Plate: Cheapest Protein Metrics Ranked
Protein is usually the single biggest line item on a grocery receipt, but "expensive" and "cheap" protein aren't about the price tag on the package — they're about cost per gram of actual protein delivered. A pack of chicken breast and a can of black beans look nothing alike on a sticker, but ranked by protein efficiency, the gap between them (and the surprises in between) is worth knowing before you build a menu.
Rough cost-per-gram-of-protein ranking (least to most expensive)
| Protein source | Relative cost per gram of protein |
|---|---|
| Dried lentils | Lowest |
| Dried beans | Very low |
| Eggs | Low |
| Peanut butter | Low |
| Chicken thighs | Moderate |
| Canned tuna | Moderate |
| Firm tofu | Moderate |
| Ground beef (80/20) | Moderate-high |
| Chicken breast | Higher |
| Salmon / shrimp | Highest |
Exact numbers shift with weekly prices, but the pattern holds consistently: legumes and eggs are almost always your cheapest route to hitting a protein target, and boneless chicken breast — despite its budget-cooking reputation — is usually more expensive per gram of protein than thighs, canned tuna, or tofu.
Why this changes how you should build a plate
Instead of asking "what protein can I afford," flip the framing: build meals where dried lentils or beans supply the protein base, and use a smaller amount of a pricier protein (chicken, beef, shrimp) as a flavor accent rather than the main event. A half pound of ground beef stretched across a pot of lentil bolognese delivers nearly as much total protein as a full pound of beef alone, at a fraction of the cost.
Don't ignore eggs
Eggs are consistently one of the cheapest complete proteins available, they don't require thawing or planning ahead, and they work in breakfast, lunch, and dinner contexts equally well. If your grocery bill is protein-heavy, a few egg-based dinners a week (fried rice, frittata, shakshuka) can meaningfully lower your average cost per meal without feeling like a downgrade.
The goal isn't to eliminate pricier proteins — it's to know which ones are actually doing the most nutritional work for your money, so the expensive cuts show up in your week deliberately instead of by default.