Search "skincare routine order" and you'll get fifty different guides, each contradicting the others. The truth is that for 90% of routines, there's exactly one rule that matters: thinnest to thickest.
If you absorb only that, you're already doing better than most people overthinking pH and waiting times.
Why thin-to-thick is the only rule that matters
Skincare products don't penetrate skin equally. Heavy creams form an occlusive layer on top — they trap whatever's under them but block anything new from getting in. Lightweight watery products (toners, essences, serums) absorb fast and leave the surface ready for the next layer.
If you put a heavy moisturiser on first, then a watery serum on top, the serum has nowhere to go. It sits on the cream, slowly evaporates, and you've effectively wasted that step.
If you go thin-to-thick, each layer absorbs into the previous one, delivering its actives where they need to be.
That's it. That's the entire rule.
The actual sequence
Here's how the rule plays out in practice for both AM and PM:
Morning (AM)
- Cleanser — gentle, water-based. Remove overnight oil.
- Toner or essence — most watery layer. Hydration prep.
- Vitamin C or other antioxidant serum — runny, fast-absorbing.
- Niacinamide / hyaluronic / peptide serum — slightly thicker.
- Eye cream — small amount around eye area only.
- Moisturiser — gel for oily skin, cream for dry.
- Sunscreen — always last. Always SPF 30+, ideally 50.
Evening (PM)
- Oil cleanser (if you wore SPF or makeup).
- Water-based cleanser — second cleanse for truly clean skin.
- Toner or essence — same as AM.
- Treatment — retinol, AHA, BHA, or other actives. One at a time.
- Hydrating serum — buffer the active above.
- Eye cream.
- Moisturiser — heavier than AM is fine; you're not going under SPF.
You don't need every step. You need them in this order if you do them.
Things you can usually skip without consequence
- Pat-don't-rub — the difference is unmeasurable. Use whatever motion you like.
- Wait 20 minutes between layers — 30 seconds is enough for any modern serum to absorb. The pH-equilibration argument applies to prescription strength acids only.
- Eye cream — most "eye creams" are just moisturiser sold at 4× the price for 1/4 the size. A dab of your regular moisturiser does the same job for 99% of people.
- Toner — necessary in K-Beauty layered hydration; optional otherwise. Skip if you're chasing simplicity.
Things that genuinely matter and people get wrong
- SPF goes last in the AM, full stop. No serum on top, no makeup primer that disrupts the film. SPF needs an even, undisturbed layer.
- Don't mix retinol with AHA / BHA on the same night. This is the one stacking rule that's actually about chemistry, not vibes. They work on the same exfoliation mechanism — combining them means redness, peeling, and a damaged barrier.
- Sunscreen is the only anti-ageing product with strong evidence. If you do nothing else from this list, do that.
The honest answer to "what order should I use my products?"
Pick the products in the rough buckets above. Apply them in the order listed. Stop overthinking the rest. The differences between "perfect" order and "close enough" order are imperceptible compared to whether you stick to the routine at all.
If you want a routine designed for your skin specifically — including the conflict checks (retinol nights, when to skip the BHA, what to swap when you're breaking out) — start a free 60-second skin scan. We'll build it from your concerns, your shelf, and your method.