The worry is fair. Tallow is fat, you've seen "comedogenic" ratings online, and nobody wants a bar that breaks them out.
The short version is that the rating people quote doesn't measure what they think it measures, and it definitely doesn't measure soap.
What comedogenic actually means
Comedogenic means a substance tends to block pores and form comedones, the clogs behind blackheads and whiteheads.
The ratings float around skincare forums on a scale of zero to five. Here's the catch. Those numbers were worked out for raw oils and butters left sitting on skin, often tested decades ago in conditions nothing like real use. They describe an ingredient sitting on your face all day in a leave-on product.
That's a leave-on question. Soap is the opposite of leave-on.
Saponified tallow is not tallow
This is the part that gets missed. Once tallow is made into soap, it isn't tallow anymore.
Saponification chemically changes the fat. The tallow reacts with lye and becomes soap and glycerin, a new thing with new behaviour. Raw tallow and saponified tallow are not the same substance, so a comedogenic rating for raw beef fat tells you nothing useful about a tallow soap bar.
And then you rinse it off. It's on your skin for seconds, doing its job, and then it's down the drain. A pore-clogging rating built for an oil that sits on skin for hours doesn't carry over to a soap that's gone in a rinse.
So does it clog pores or not
For most people, washing with tallow soap doesn't clog pores, because it doesn't stay on the skin to do so. It cleans and rinses clean.
We'll be straight with you on the limit of that. Skin is individual. Some people break out from things that suit everyone else, and there's no bar on earth that every single person tolerates. If you're acne-prone, patch test, give it a week on a small area, and let your own skin be the judge. That's the honest answer, and it's a better one than a number off a forum.
The simpler reassurance
What we can tell you plainly is what's in it. One ingredient. Grass-fed beef tallow, turned to soap, glycerin left in. No added oils sitting on your skin, no fragrance, no synthetics, nothing engineered to cling.
A short ingredient list is its own kind of answer. There's very little here to cause trouble, and what's here rinses away.