About $400 a year if you’re buying frozen prepared meals instead of cooking from scratch — that’s the difference for a household that swaps out three frozen dinners a week for homemade equivalents. The freezer aisle has a reputation as the budget section of the grocery store, and for some items that reputation is earned. For others, you’re paying a steep convenience tax.

This isn’t about whether frozen food is “bad” or whether you should never buy it. It’s about knowing which frozen items are actually cheaper than their alternatives and which ones are marked up 3-5x for the convenience of not boiling water. I’ll walk through the math on vegetables, prepared meals, and single-serve sides, then give you a two-question test to run in the aisle.

Where frozen wins

Frozen vegetables are the success story. A 16-ounce bag of frozen broccoli runs about $1.50, or 9 cents per ounce. Fresh broccoli is around $1.99 per pound in season — roughly 12 cents per ounce — and can hit $3.49 per pound in winter. Frozen is flash-frozen at peak ripeness, so the nutrition is comparable or better than fresh that’s been sitting in transit for a week. The math works, the quality works.

Frozen fruit follows the same pattern. A pound of frozen strawberries costs $2.50 to $3.00 year-round. Fresh strawberries swing from $2.00 per pound in May to $5.00 in January. If you’re making smoothies or baking, frozen is the clear winner outside of peak season.

Frozen French fries are surprisingly cheap — a 2-pound bag costs about $2.50, or roughly 8 cents per ounce. A 5-pound bag of fresh potatoes is cheaper per ounce (around 4-5 cents), but once you account for peeling, cutting, and the oil for frying, the gap narrows. For oven fries, frozen is a reasonable trade.

Where frozen costs you

Frozen prepared meals are where the math falls apart. A frozen lasagna serving you $4.50 to $6.00 per portion. Homemade lasagna — even with decent ingredients, fresh mozzarella, and Italian sausage — runs about $2.00 per serving when you make a 9x13 pan. That’s a $2.50 to $4.00 markup per serving for assembly and freezing.

Frozen burritos cost $1.50 to $2.50 each for the name brands. You can make a batch of 12 burritos at home for about $12 to $15 in ingredients (tortillas, beans, rice, cheese, salsa), or $1.00 to $1.25 each. Freeze them yourself in foil and you’ve got the same convenience at half the cost.

Frozen pizza is more of a wash. A decent frozen pizza runs $5.00 to $7.00 and feeds two people as a meal — call it $2.50 to $3.50 per serving. Homemade pizza costs about $2.00 per serving if you make the dough, closer to $3.00 if you buy dough from the store. The markup exists, but it’s not egregious. If you’re not a pizza-from-scratch person, frozen is fine.

The real offenders: single-serve sides

This is where frozen food pricing gets absurd. A 24-ounce package of frozen mashed potatoes costs about $3.50, or 15 cents per ounce. A 5-pound bag of fresh potatoes costs $2.50 to $3.00, or 3-4 cents per ounce. Add butter and milk and you’re still under 6 cents per ounce. That’s a 3-4x markup for someone to boil and mash potatoes for you.

Frozen rice sides are similarly expensive. A 12-ounce bag of frozen rice pilaf costs $3.00 to $4.00, or about 25-33 cents per ounce. Dry rice costs 5-8 cents per ounce, and even with butter, broth, and seasonings, you’re looking at maybe 10 cents per ounce cooked. The convenience markup is real.

Frozen mac and cheese, frozen pasta sides, frozen stuffing — they all follow the same pattern. You’re paying 3-5x the cost of the raw ingredients for 10 minutes of saved labor.

The two-question test

When you’re standing in the freezer aisle, ask yourself two things: Is this an ingredient or a finished product? And is the convenience worth the markup?

Frozen vegetables, fruit, and plain proteins (chicken breasts, fish fillets, shrimp) are ingredients. They’re frozen for preservation, not convenience, and the pricing reflects that. The math usually works.

Frozen meals, sides, and anything with “just heat and serve” on the package are finished products. Someone cooked it for you, and you’re paying for that labor. Sometimes the markup is reasonable (pizza, certain ethnic entrees). Often it’s not (mashed potatoes, rice, pasta sides).

If you’re buying frozen meals because you genuinely don’t have time to cook, that’s a valid trade. But if you think you’re saving money by shopping the freezer aisle instead of cooking from scratch, check the per-ounce math. The savings often aren’t there.

A note on the math

All prices are based on a mid-sized Midwestern grocery chain as of late 2024. Your regional pricing will vary, but the ratios tend to hold. The $400 annual savings assumes replacing three frozen prepared meals per week (at $5 each) with homemade equivalents (at $2.50 each), or a $2.50 weekly savings over 52 weeks. I’m not counting the frozen vegetables you should keep buying.

Frozen ingredients are still good math. Frozen meals are a convenience tax — and often a steep one.