How Much Does a Keratin Treatment Cost?

How much does a keratin treatment cost? At most salons, a professional keratin treatment costs a few hundred dollars, and the final price depends on your hair length, your hair thickness, and which smoothing system you choose. At Numi Hair Salon in Scarsdale, smoothing treatments start at $350.

Below you will find real Numi prices for every smoothing treatment we offer, what changes the price, how long each one lasts, and what that works out to per month. We also cover add-ons, formaldehyde-free options, and how to make your treatment last.

How much does a keratin treatment cost on average?

A salon keratin treatment usually costs a few hundred dollars in the U.S. Prices change a lot from state to state. StyleSeat’s price data shows state averages ranging from $82 to $400, with New York averaging about $242.

Keep in mind that an average mixes quick, budget treatments with full professional services. Premium salons that use name-brand systems and longer appointment times tend to charge more than the average.

How much is a keratin treatment at Numi Hair Salon?

At Numi, keratin and smoothing treatments start at $350, and Magic Sleek starts at $375. Here is how our four treatments compare:

Every price is a starting price. Your stylist confirms the final cost at your consultation based on your hair.

Want the full details on each system? See our keratin and smoothing treatments page.

What affects the cost of a keratin treatment?

Hair length and thickness have the biggest effect on the price of a keratin treatment. Longer, thicker hair takes more product and more time to apply and seal.

• Hair length: Hair past the shoulders needs more product than a bob.
• Hair thickness: Dense or coarse hair takes longer to section, apply, and flat iron.
• Treatment type: Each system works differently and lasts a different length of time.
• Add-ons: Bond builders and repair treatments add a small cost on top.

Are there add-ons that change the price?

Yes. Many clients add a strengthening or repair treatment to their smoothing service. At Numi, these add-ons include:

• Olaplex: $25+
• Kerastase Power Dose: $25+
• K18 Treatment: $20
• Milbon Treatment: $50

Your stylist can tell you if an add-on makes sense for your hair, especially if it is color-treated or feels dry.

How long does a keratin treatment last?

A keratin treatment lasts anywhere from about 10 weeks to more than 6 months, depending on the system. Here is how long each Numi treatment lasts:

• Brazilian Blowout: 10 to 12 weeks
• Keratin Complex: Up to 5 months
• Lasio Keratin: 4 to 6 months
• Magic Sleek: 6+ months

How you care for your hair matters too. Gentle, sulfate-free shampoo and less heat help any treatment last longer.

What does a keratin treatment cost per month?

A keratin treatment can cost less per month than you might think. Divide the starting price by how many months it lasts, and the longer-lasting systems come out ahead:

• Brazilian Blowout ($350+, 10 to 12 weeks): about $126 to $152 per month
• Keratin Complex ($350+, up to 5 months): about $70 per month or more
• Lasio Keratin ($350+, 4 to 6 months): about $58 to $88 per month
• Magic Sleek ($375+, 6+ months): about $63 per month or less

These numbers use starting prices, so your cost may be a bit higher. Still, it shows why many clients choose a longer-lasting treatment even when the price tag is a little higher. For a closer look at the longest-lasting option, read our guide to Magic Sleek treatment cost. For the shortest one, see how much a Brazilian Blowout costs.

Is a keratin treatment worth the money?

A keratin treatment is worth the money for most people with frizzy, coarse, or hard-to-manage hair. It cuts down on daily blow-drying and flat ironing, and it helps hair stay smooth in humid weather.

It may not be worth it if your hair is already smooth, if you love your natural curl pattern and do not want it relaxed, or if you are not ready for the aftercare. It is also smart to plan around big color changes. Our post on coloring your hair after a keratin treatment explains the timing.

Are there formaldehyde-free keratin treatments?

Yes. At Numi, Keratin Complex (Formaldehyde Free) and Magic Sleek are both formaldehyde-free. If you are expecting, read whether you can get a keratin treatment while pregnant and talk with your doctor before booking any smoothing service.

How do you make a keratin treatment last longer?

You make a keratin treatment last longer by washing gently and keeping heat and harsh products away from your hair. A few habits go a long way:

• Use a sulfate-free shampoo and conditioner.
• Follow your stylist’s instructions on when you can first wash and tie up your hair.
• Wash a little less often if you can.
• Rinse after swimming in chlorine or salt water.

Seeing some frizz in the first few days? That is common. Our post on why hair can look frizzy after a keratin treatment explains what is normal and what to do.

Keratin treatment cost questions, answered

Want smooth, frizz-free hair in Westchester?

The right smoothing treatment depends on your hair, your routine, and how long you want results to last. Our stylists will look at your texture and color history, then recommend the treatment that gives you the best value for your hair.

Numi Hair Salon is in Scarsdale. We are rated 4.9 stars across more than 2,470 Google reviews. We have been voted Best of Westchester and named one of the Top 100 Salons in the U.S. Call us at (914) 574-6402 with any questions.

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