How Much Beef Tenderloin Per Person? Trim and Sizes

Buy 1/2 pound of trimmed beef tenderloin per adult, or 3/4 pound if you are buying a whole untrimmed one and doing the trimming yourself. That gap is not a rounding allowance — an untrimmed tenderloin arrives with a fat cap, a sheet of silverskin and a long side muscle called the chain still attached, and all three come off before it cooks. You pay for them by the pound either way.

This is the cut where over-buying hurts most, so it is worth knowing why the price is what it is. South Dakota State University Extension’s breakdown of a fed steer puts the whole loin and rib “middle meats” at 10–12% of carcass weight, and tenderloin at about 1.5% or less — on their worked example, a 1,200 lb steer gives a 750 lb carcass and only about 9 pounds of tenderloin steaks. One animal, nine pounds. Everything about the price follows from that.

The chart

Guests	Trimmed tenderloin	Whole untrimmed to buy
4	2 lb	3 lb
6	3 lb	4 1/2 lb
8	4 lb	5 1/2–6 lb
10	5 lb	7 lb
12	6 lb	8–9 lb (two roasts)
16	8 lb	two 5–6 lb roasts
20	10 lb	two 7 lb roasts

Half a pound per person sits at the generous end of South Dakota State’s holiday rule of thumb for a boneless roast, which is 1/2 to 3/4 of a pound per person. Tenderloin earns the lower end of that band honestly: it is boneless, almost entirely lean, and it loses less in the oven than a fatty roast does, so nearly everything you buy reaches a plate.

Individual filets are a different way of asking the same question, and the answer there is object-based rather than weight-based — 6 to 8 oz each, the same logic as our steak sizes per person chart.

What the trim actually costs you

A whole untrimmed tenderloin — often sold as “PSMO,” peeled side muscle on — is the cheapest way to buy this cut per pound and the most misleading. Three things come off:

• The chain. A long, sinewy strip running the length of the roast. It is genuinely good meat once the connective tissue is out of it, but it is not roast, and it is a meaningful share of the weight. Trim it into cubes for stew or grind it.
• Silverskin. A tough iridescent membrane that does not render, does not soften and will shrink and warp the roast if you leave it on. It comes off in strips with a thin flexible knife.
• The fat cap and the tapered tail. The tail is too thin to cook at the same rate as the centre; fold it under and tie it, or cut it off for another meal.

Budget on that lot being a real fraction of what you carry home, which is why the right-hand column above is about 1 1/2 times the left. If you would rather not spend forty minutes with a boning knife before a dinner party, buy a centre-cut trimmed roast and use the left-hand column directly. It costs more per pound and often less per serving.

Three things that move the number

South Dakota State frames buying meat around who, what and when, and tenderloin responds to all three more than most cuts:

• Who is eating. Tenderloin is rich and lean at the same time, and people eat less of it than they expect to. A 6 oz portion satisfies most adults; 8 oz is a big serving. Children eat slices, not portions.
• What else is on the table. A tenderloin served with a starch, a green vegetable and bread is a half-pound-per-person roast. Served as the whole event with a salad, add a quarter pound a head.
• When it is served. A sliced roast on a buffet goes further than plated portions, because nobody has to commit to a whole steak. Count 5 oz of cooked meat per adult on a buffet plus a margin for seconds, and keep it covered — an open platter of sliced beef cools fast, and our keeping food warm for a party guide covers the fixes.

Cooking it without wasting it

Tenderloin is the least forgiving roast in the shop. It is lean, so there is no fat to buy you time, and it is expensive, so the mistake is costly.

University of Illinois Extension gives whole beef cuts at 145°F for medium rare, 160°F for medium and 170°F for well done — but those are finished temperatures, and a roast keeps climbing after it leaves the heat. South Dakota State’s guidance for a large beef roast is that the meat continues cooking for 10 to 20 minutes after it comes out, so pull at 130–135°F for medium rare or 140–145°F for medium, and rest it 10 to 15 minutes before cutting.

Illinois Extension also makes the point that saves this cut: color is not a reliable indicator of properly cooked meat. A tenderloin browns handsomely on the outside long before the centre is anywhere, and it goes from perfect to grey in about four minutes. An instant-read thermometer like the ThermoPro TP19H is not optional equipment here.

Two more practical notes. Tie the roast at 1 1/2-inch intervals so it holds an even thickness — an untied tenderloin cooks unevenly along its length and the thin end is well done before the middle is warm. And carve it in 3/4-inch slices rather than thin ones; thick slices hold their heat and their juice, which is exactly what our wider meat quantities per person chart assumes when it prices a serving.

FAQ

How much beef tenderloin do I need for 10 people?

About 5 lb trimmed, or a 7 lb whole untrimmed roast that you trim yourself.

How many people does a 4 lb beef tenderloin feed?

Eight, if it is already trimmed. If it is a whole untrimmed 4 lb roast, count on five or six after the chain, silverskin and tail come off.

Is it cheaper to buy a whole beef tenderloin?

Per pound, almost always. Per serving, less clearly — you are buying trim you will throw away or repurpose, so run the arithmetic on the trimmed weight before deciding.

How much tenderloin per person for a buffet?

Around 5 oz of cooked, sliced meat per adult plus a margin for seconds. Sliced beef goes further on a buffet than whole portions do.

What temperature should beef tenderloin be pulled at?

130 to 135°F for medium rare, 140 to 145°F for medium, because it keeps cooking for 10 to 20 minutes out of the oven. Rest it 10 to 15 minutes before slicing.

How much beef tenderloin for a child?

Two to three ounces, best given as slices off the roast rather than a portion of its own.