Best Budget Hair Oils & Serums Under $20 (2025)
Hair oil is the secret weapon for glossy, frizz-free, salon-finish hair. These lightweight oils and serums nourish, protect, and add brilliant shine — all for under $20. Whether your hair is thick and coarse or fine and flyaway-prone, there's an affordable oil that'll transform your routine.
Our Top Picks
1. Moroccanoil Treatment Original — $17.99
The OG of hair oils. Moroccanoil's signature treatment combines argan oil and linseed extract for instant shine, conditioning, and smoothness. A few drops through damp or dry hair tames frizz and adds a glossy finish that lasts all day. The 3.4oz bottle lasts months, making the per-use cost surprisingly affordable. This is the one that started the hair oil revolution.
✅ Iconic product • ✅ Instant shine • ✅ Frizz elimination • ✅ Lasts 3-4 months
2. OGX Renewing Argan Oil of Morocco Penetrating Oil — $7.99
OGX delivers pure argan oil at an unbeatable price. This lightweight, fast-absorbing oil penetrates the hair shaft to strengthen from within while adding instant radiance on the surface. It's perfect for all hair types and won't leave heavy residue. At under $8, it's the best value hair oil on the market — period.
✅ Pure argan oil • ✅ Fast absorption • ✅ All hair types • ✅ Best value pick
3. Biosilk Silk Therapy Original — $14.99
A cult classic that's been winning awards for decades. Biosilk's silk protein formula smooths, shines, and protects against heat and environmental stressors. It works on both skin and hair, making it a versatile travel companion. The weightless formula is ideal for fine to medium hair that needs shine without heaviness.
✅ Silk protein technology • ✅ Weightless formula • ✅ Heat protection • ✅ Multi-use (hair + skin)
4. Palmer's Cocoa Butter Formula Hair Oil — $5.99
The ultimate budget pick. Palmer's blends cocoa butter, vitamin E, and keratin into a lightweight oil that deeply conditions and adds gorgeous shine. It's especially great for thick, textured, or curly hair that craves moisture. At just $6, this is proof that you don't need to splurge for beautiful, healthy-looking hair.
✅ Deep conditioning • ✅ Cocoa butter + keratin • ✅ Textured hair approved • ✅ Under $6
How to Use Hair Oil Like a Pro
- Less is more: Start with 1-2 drops, add more if needed
- Apply to mid-lengths and ends: Avoid the scalp to prevent greasiness
- On damp hair: Apply before blow-drying for heat protection and smoothness
- On dry hair: Use as a finishing touch for shine and frizz control
- Overnight treatment: Apply generously, braid hair, wash out in the morning
Frequently Asked Questions
What does hair oil do that conditioner doesn't?
Hair oil provides concentrated nourishment and heat protection that conditioner rinses out. Oils seal the cuticle, add shine, reduce frizz, and protect against environmental damage. Think of conditioner as hydration and oil as protection and finishing.
Should I apply hair oil to wet or dry hair?
It depends on the oil and your goal. Apply lightweight oils to damp hair before styling for heat protection and moisture retention. Use heavier oils on dry hair as a finishing treatment for shine and frizz control. Always start with a small amount — you can add more but can't remove excess.
Can hair oil make my hair greasy?
Yes, if you use too much. Start with 1-2 drops for short hair and 3-5 drops for long hair. Focus on the mid-lengths and ends, avoiding the roots. Lightweight oils like argan absorb quickly and are less likely to cause greasiness.
Is expensive hair oil worth it?
Not necessarily. Many affordable hair oils contain the same key ingredients (argan oil, jojoba, vitamin E) as luxury brands. The main differences are often fragrance and packaging. OGX and Biosilk deliver salon-quality results at drugstore prices.