How Long to Grill a Beef Tenderloin?

A whole beef tenderloin usually shows up on the grill once or twice a year, for a holiday dinner or a night when you are trying to impress a table of guests, and the meat itself can run $15 to $30 a pound. A rare cook plus an expensive cut is exactly why “how long to grill a beef tenderloin” gets searched so often instead of people just eyeballing it the way they would a couple of burgers. Below is the actual time and temperature breakdown, plus the parts of the process most guides skip, including the tapered shape that cooks unevenly, the choice between a whole roast and individual filet steaks, and what to do if you are standing at the grill without a thermometer for a $60 piece of meat.

Grill Time for a Whole Beef Tenderloin by Method

Time depends more on the size of your tenderloin and your grilling method than on a single number, so use these as a starting range and finish by temperature, not the clock.

Center-cut roast, 2 to 3 pounds (often labeled Chateaubriand). Sear 2 to 3 minutes per side over direct high heat to build a crust, then move to indirect heat with the lid down for 20 to 30 minutes total.
Full untrimmed tenderloin, 4 to 6 pounds. Plan on 35 to 50 minutes total using the same sear-then-indirect approach, since the extra length and the tapered tail add cooking time without adding much thickness.
Gas grill. Preheat one zone to 450 to 500°F for the sear and keep a second zone at 350 to 375°F for the indirect finish. Two burner zones make this easy to control without opening the lid constantly.
Charcoal, two-zone fire. Bank the coals to one side for a hot sear zone and a cooler indirect zone. Good lump charcoal lights faster and holds a steadier low temperature for the indirect phase than briquettes, which matters here since that phase is most of your total cook time.
Reverse sear on a pellet grill or smoker. Smoke at 225 to 250°F until the center reads 115 to 120°F, roughly 45 to 60 minutes depending on size, then move to a hot sear station or a cast iron pan for 60 to 90 seconds per side. This is the method we recommend for a full tenderloin specifically because it gives the tapered ends more margin before the center catches up, which solves the single biggest complaint people have with this cut.

What Internal Temperature to Pull It At

There are two numbers floating around, and they exist for different reasons. The USDA’s minimum safe internal temperature for whole cuts of beef, including tenderloin roasts, is 145°F, followed by a rest of at least three minutes. That is a food safety floor, not a doneness preference.

Classic steakhouse medium-rare, the doneness most people actually want from a tenderloin, sits closer to 130 to 135°F after resting. Because carryover cooking raises the internal temperature another 5 to 10 degrees once the meat is off the heat, many home cooks pull the roast around 120 to 125°F and let it climb to their target during the rest. If food safety is your priority, especially if you are serving guests with health considerations, cook to the USDA’s 145°F minimum. If you are chasing classic medium-rare, understand that going below that number is a doneness choice, not an accident, and that whole muscle cuts like tenderloin carry a different risk profile than ground beef because contamination risk is concentrated on the exterior, which the sear addresses directly.

The Tapered Shape Problem That Ruins Most Tenderloins

A whole tenderloin is thick at the head and narrows to a thin tail, sometimes by more than an inch in diameter. Grill it as-is and the tail is overcooked gray meat by the time the thick end hits medium-rare. This is the single most common reason people end up disappointed with an expensive cut, and it is also the part most grilling guides never mention.

Two fixes work. Fold the thin tail under itself so the whole roast is a more uniform cylinder, then tie it every inch and a half with plain cotton kitchen twine. This is standard butcher practice and takes under five minutes. Or cut the tail off entirely, about the last 6 inches, season it separately, and grill it 4 to 5 minutes total over direct heat for steak bites or a quick pan sauce test piece while the evenly-shaped remainder cooks on its own timeline.

Either way, you need to check temperature at more than one spot along the roast, and you need to do it fast so you are not holding a hot grill lid open while you wait on a slow reading. A one-second instant-read thermometer like the ThermoWorks Thermapen ONE makes this practical instead of a hassle, since checking the head, center, and tail takes seconds instead of a slow 15 to 20 second wait per spot with a budget probe.

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How to Watch the Temperature Without Standing at the Grill

If this tenderloin is the centerpiece of a dinner party, you are probably not planning to hover over the grill for 40 minutes while your guests are inside. A wireless leave-in probe solves that specific problem. Insert it into the thickest part of the roast before it goes on the grill, and it sends temperature updates to your phone so you can mingle and still catch the exact moment to pull the meat.

For direct-flame grilling specifically, you need a probe rated for high ambient heat, not just internal meat temperature. A regular wireless probe rated to roughly 212°F ambient will fail near an open flame or hot sear zone. The MEATER Pro is rated to 1000°F ambient, which is what makes it usable for a reverse sear finish over direct heat instead of only oven or smoker use.

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What to Do If You Do Not Own a Meat Thermometer

The touch test, pressing the meat and comparing the give to your palm at different finger positions, is unreliable enough on a $10 chicken breast. On a $60 tenderloin it is not worth the risk. If buying a dedicated thermometer is not in the budget for a once-a-year roast, even a basic $15 to $20 instant-read from a grocery store or hardware store is a better bet than guessing, and it pays for itself the first time it saves a roast from overcooking. Our full guide to the best digital meat thermometers covers reliable options at every price point, including several under $20 that still hit acceptable accuracy for a home kitchen.

If you truly have nothing on hand, use the visual and time-based ranges above as your best estimate, cut into the thickest part before serving to check the color, and lean toward pulling it slightly earlier than you think, since a tenderloin that is a little too rare can go back on the grill for another minute, but one that is overcooked cannot be fixed.

Grilling Tenderloin Steaks Instead of a Whole Roast

If your tenderloin is already cut into individual filet steaks rather than a whole roast, the timing and the tapered-shape problem both change. A 1.5 to 2 inch thick filet needs 4 to 5 minutes per side over direct high heat for medium-rare, pulled around 125°F before a short 5 minute rest. Since each steak is a uniform cylinder, you do not need the tying or trimming steps above, just a fast, accurate spot check in the center of each steak.

Resting and Slicing

Tent the roast loosely with foil and rest it 10 to 15 minutes for a whole tenderloin, or about 5 minutes for individual steaks. Resting under a tight foil wrap traps steam and softens the crust you just worked to build, so keep it loose. Slice against the grain into medallions roughly 3/4 inch thick. If you tied the tail under earlier, remove the twine before slicing, not after.

Frequently Asked Questions

How long does it take to grill a beef tenderloin per pound?

There is no reliable per-pound number for this cut because a tenderloin’s diameter, not its total weight, determines cook time, and the diameter barely changes between a 3 pound and a 5 pound roast since the extra weight is mostly length. Go by internal temperature and the size ranges above rather than a per-pound formula.

Can I grill a frozen beef tenderloin?

No. Thaw it fully in the refrigerator first, which takes 24 to 48 hours depending on size. Grilling from frozen cooks the outside long before the center comes up to temperature, which defeats the even, controlled cook this cut needs.

Do I need to marinate beef tenderloin?

No. Tenderloin is naturally tender since it comes from a muscle that does very little work, so a marinade will not meaningfully change the texture. Salt generously at least 40 minutes before grilling, or use a simple dry rub, and let the meat itself be the flavor.

What is the difference between gas and charcoal for grilling tenderloin?

Charcoal and wood add smoke flavor and can reach higher direct-sear temperatures, which helps with crust. Gas gives you steadier, easier-to-control indirect heat for the finishing phase. The reverse sear method described above works well on either, so pick based on the flavor and convenience tradeoff rather than assuming one is required.