Filet Mignon vs Top Sirloin: Tenderness, Price and Cooking Differences

Filet mignon and top sirloin, side by side

The Beef Checkoff, an industry source, identifies filet mignon as a boneless tenderloin steak from the loin and top sirloin as a boneless steak from the sirloin primal. Its cut guides call both lean, while describing tenderloin as the most tender cut and top sirloin as flavorful and versatile. Those descriptions identify the cuts; they are not a substitute for inspecting the particular packages in front of you.

• Compare filet and sirloin with other steak cuts

Sources: Beef Checkoff — tenderloin steak (filet mignon) cut guide (beef industry source) · Beef Checkoff — top sirloin steak cut guide (beef industry source)

Make sure the label names the cut you mean

Filet mignon is a tenderloin steak, but a whole tenderloin, tenderloin tips and a restaurant filet are different portion formats. Top sirloin is also specific: it is not the same name as sirloin tip, petite sirloin, tri-tip or bottom sirloin. Ask for the full cut name when the package or menu says only “sirloin.”

At a butcher counter, request two or more steaks of similar thickness if they will cook together. Equal weight does not guarantee equal shape. A tall, compact filet and a broad sirloin can each weigh eight ounces while putting very different distances between the surface and the center.

Sources: Beef Checkoff — tenderloin steak (filet mignon) cut guide (beef industry source) · Beef Checkoff — top sirloin steak cut guide (beef industry source) · Beef Checkoff — center-cut top sirloin identification (beef industry source)

Compare cut and grade separately

Filet mignon and top sirloin are cut names. Prime, Choice and Select are USDA quality grades. USDA's Agricultural Marketing Service says Prime has at least slightly abundant marbling, Choice has less marbling than Prime and Select is normally leaner than the higher grades. A Prime top sirloin and a Choice filet therefore differ in both cut and grade.

For a fair counter comparison, start with steaks of the same grade. Then inspect the thickness, trimming and visible marbling. Tenderloin's anatomical tenderness is its defining appeal; it does not need to resemble a ribeye to be a legitimate filet.

Sources: USDA Agricultural Marketing Service — beef quality grades and marbling

Use the package total, not the reputation

Filet mignon often carries the higher price per pound, but the exact difference changes by grade, store, trim, package size and promotion. Compare the current shelf tags rather than treating a fixed price gap as universal. If both steaks are boneless, multiplying the price per pound by the package weight gives a useful first comparison.

For example, an eight-ounce filet at a hypothetical $29.99 per pound is about $15.00, while an eight-ounce top sirloin at a hypothetical $14.99 per pound is about $7.50. Those figures demonstrate the math; they are not current market quotations. If the sirloin package contains two steaks and the filet package contains one, compare the total cost and the number of portions you will actually serve.

Also price the complete meal. A smaller filet may leave room in the budget for vegetables or a sauce; one larger top sirloin may be sliced across several plates. The useful question is what the purchase costs per planned serving, not which cut sounds more prestigious.

• Use the complete steak-buying checklist
• Compare steak cost per usable portion

Plan cooking around thickness and shape

The Beef Checkoff's skillet chart gives different approximate ranges for tenderloin and top sirloin at the same listed thickness. That is useful as a reminder to check the steaks separately, but the chart is an industry planning aid, not a promise for your pan. Starting temperature, pan temperature, exact dimensions and equipment all change the result.

A thick filet benefits from checking through the side so the probe reaches the center. A wide sirloin may have a thin end and a thick end; check the thickest edible center and move thinner portions away from the hottest area if needed. USDA FSIS says to place the thermometer in the thickest part, away from bone, fat or gristle.

Use a timer to remind you to check, not to declare the steak finished. FoodSafety.gov lists 145°F for beef steaks with a three-minute rest. Reach 145°F before removing the steak from the heat, then rest it at least three minutes.

• Plan steak timing by thickness
• Check temperature without cutting the steak

Sources: Beef Checkoff — skillet timing guidelines by cut and thickness (beef industry source) · USDA FSIS — food thermometer placement · FoodSafety.gov — safe minimum temperature and rest time for beef steaks

Choose for the dinner you are making

Neither cut wins every comparison. Filet concentrates the purchase around tenderness; top sirloin stretches into more serving formats. Let the label, actual portion and total price settle the choice for this dinner.

• Choose filet mignon when a very tender texture and compact individual portion justify the price for you.
• Choose top sirloin when you want a whole steak, sliced platter or kebabs from a versatile cut.
• For several diners, match thickness within each cut and expect to check filets and sirloins separately.
• At a steakhouse, ask for the grade, portion weight and preparation before comparing two menu prices.