Labeling soap to sell isn't hard once you know which set of rules applies to you — and there are only two. The deciding factor is what your bar is made of. So before anything else, let's figure out which kind of soap you're holding, because it changes what your label needs.

First: Which Kind of Soap Do You Have?

This is the most important question in the whole article, so let's make it plain. There are two categories, and your base decides which one you're in:

• True soap — made the traditional way, where the cleaning comes from soap itself (saponified oils and an alkali), with no added detergents. If you're using a detergent-free base like our True Soap base, this is you.
• Detergent soap (a cosmetic) — a bar where detergents do some or all of the cleaning. If you're using a detergent-boosted base like our Bubble Luxe or Formulator Base, your bar is technically a cosmetic, not "true soap" — and that's completely fine, it just follows a different set of label rules.

Not sure what's in your base? Check the product description or ask your supplier — for MMC bases, it's noted on each base's product page.

True Soap vs. Soap with Detergents, Side by Side

Here's the whole difference at a glance. Find your column, then follow that path below.

As you can see, the first three lines are identical. The detergent (cosmetic) bar just adds a few items — most importantly, an ingredient list. Now follow your path.

Labeling True Soap (3 Elements)

If your bar is true soap (detergent-free, cleaning claims only), it's regulated by the Consumer Product Safety Commission, and your label needs just three things:

That's the entire legal requirement. True soap doesn't have to list ingredients — though many makers include them anyway as a courtesy, since allergy-conscious customers appreciate it. Everything else — your soap's name, logo, scent, design — is yours to play with.

Labeling Detergent Soap (6 Elements)

If your bar contains detergents (like our Bubble Luxe or Formulator Base), it's a cosmetic under the FDA, and the label adds a few items to the same foundation:

Building the ingredient list

This is the one genuinely new piece, and it's very doable:

• Order of predominance — list ingredients from most to least by amount.
• The 1% rule — ingredients at 1% or less can be listed in any order, after everything over 1%.
• Colors last — color additives go at the very end.
• Use INCI names — the standardized cosmetic ingredient names (for example, water is "Aqua," shea butter is "Butyrospermum Parkii Butter").

Net Weight, the Right Way

Whichever path you're on, net weight follows the same rules and trips up more makers than anything else:

• Weight, not volume — soap is sold by weight (ounces and grams), not fluid ounces.
• Both units — list US and metric, e.g. "Net Wt. 4.5 oz (128 g)."
• The finished, dry bar — weigh the settled bar as the customer receives it, not the fresh pour.
• Bottom of the front — net weight goes in the bottom 30% of the front panel.

Labeling a "Naked" Bar: Bands & Tags

You don't have to hide a beautiful bar in a box to stay compliant. Your required information — whichever path you're on — can go on a firmly affixed band, tag, or card instead of a full wrapper.

That's how a "naked" bar stays legal: a printed belly band (a paper strip around the middle) or a shrink band carries your required info while leaving the soap visible. A hang tag works too. The one rule is that it must be firmly affixed — securely attached so it stays with the bar. Just remember a detergent (cosmetic) bar needs its ingredient list to fit on that band or tag too.

When a Claim Changes the Rules

One more thing can shift your category no matter which base you use: what you say about your bar.

• Add a cosmetic claim — like "moisturizing" or "softens skin" — to a true soap, and it becomes a cosmetic (Path B rules now apply, ingredient list and all).
• Add a drug claim — like "antibacterial," "treats acne," or "relieves eczema" — to any bar, and it becomes a drug in the FDA's eyes, a far stricter category that usually requires approved active ingredients.

To keep your label as simple as your category allows, describe only how your bar cleans, looks, and smells. For the full picture, see Is It Soap, a Cosmetic, or a Drug?.

Before You Sell: A Few Quick Checks

• Know about MoCRA — the Modernization of Cosmetics Regulation Act of 2022 is the federal law governing cosmetics, with requirements like registering your facility and reporting safety issues. True soap is exempt — the law simply doesn't apply to it.
• Detergent (cosmetic) bars fall under MoCRA — but most home makers qualify for its small-business exemption from registration because they sell less than $1,000,000 a year in cosmetic products. Even if you're exempt from registration, you're still responsible for your product's safety.
• Check your state and local rules — being fine federally doesn't automatically clear you locally. Many makers need a business license, and most need to register for sales tax.
• Keep it honest — your label and marketing should match the bar. If you call it "all natural," make sure it truly is.

Where to Learn More

For deeper detail — especially building a cosmetic ingredient list — two trusted resources are worth bookmarking:

• Marie Gale — the recognized authority on US soap and cosmetic labeling: mariegale.com.
• FDA — Cosmetics & U.S. Law — official labeling guidance, rules, and regulations: fda.gov.

Key Terms to Know

Frequently Asked Questions