Get the order right and a facial oil quietly does its job. Get it wrong and you'll swear the oil "doesn't work," when really it just never got the chance.
The good news is that the rules are simple and mostly reduce to one principle about how oil and water behave on skin. Here's the full picture: where oil sits in the routine, whether it goes before or after moisturizer, how it plays with sunscreen and makeup, when to use it, and how much.
The Golden Rule: Oil Goes Last
Skincare generally layers from thinnest and most water-based to richest and most occlusive — and facial oil sits at the occlusive end. Because oil forms a lipid layer at the surface, water-based products applied over it may not spread or absorb the way they should. So the oil goes on after everything water-based, sealing the layers beneath it rather than blocking them.
A reliable routine order looks like this:
- Cleanse — start with clean skin.
- Water-based serum or hydrating layer — humectants like hyaluronic acid or glycerin, applied to slightly damp skin.
- Moisturizer — the water-plus-emollient step that does most of the hydrating work.
- Facial oil — a thin layer, pressed in, to soften and seal.
- Sunscreen (AM only) — always the final morning step.
The only real exceptions are a few very lightweight, fast-absorbing emollients (squalane and some ester-forward formulas) that can occasionally sit under other products — but "oil last" is the correct default for almost everyone and almost every formula.
Facial Oil Before or After Moisturizer?
After. This is the single most-asked question about facial oils, and the answer follows directly from the golden rule: moisturizer is water-based (with emollients), so it goes on first, where your skin can take up its water-attracting ingredients. The oil goes on afterward, as a light sealing layer.
Applying oil before moisturizer means the moisturizer has to spread over an oil film — which it does unevenly, and which can leave the whole thing feeling heavier while working less well. If your skin is very dry, the fix isn't oil-first; it's a proper hydrating layer plus moisturizer, then oil on top.
Can you mix a drop of oil into your moisturizer? It's compatible and won't harm anything, but it dilutes both unpredictably and makes it harder to tell what's doing what. Sequential application — moisturizer, let it absorb, then oil — gives cleaner, more consistent results.
Facial Oil and Sunscreen
In the morning, sunscreen is the last step — it needs to form an even film on the outermost surface to protect properly, so nothing should go on top of it. That leaves two workable options:
- Keep oil to your evening routine — the simplest approach, and the one we'd suggest if you're unsure.
- Use a lightweight oil in the AM, fully absorbed, then sunscreen — possible with squalane or ester-forward formulas. Give the oil a few minutes to absorb, then apply SPF as normal, and check that it still spreads and feels even.
What you don't want is a heavy oil layer that keeps your sunscreen from setting into a continuous film. If SPF looks patchy or slides around over your oil, the oil was too much or too rich for morning use.
Facial Oil and Makeup
You can absolutely use a facial oil under makeup — the key is a thin layer, fully absorbed first. Apply your oil as the last skincare step, give it a few minutes to sink in, then start makeup. Rushed or over-applied, oil can leave foundation sliding or breaking apart through the day; absorbed and minimal, it gives a smooth, slightly luminous base.
A couple of ways people use oil with makeup:
- Under makeup — a thin, absorbed layer as a smoothing base (skip it in the areas where your makeup tends to slide, like the T-zone, if you're oily).
- Mixed into foundation — a single drop blended into liquid foundation for a dewier finish. Start with less than you think.
Morning or Night?
Either works — it comes down to your formula and preference. Evening is the simpler, lower-stakes choice: no sunscreen to layer over, and richer textures are more comfortable overnight. It's the right starting point if you're new to oils.
Morning use is fine with lightweight formulas, as long as the oil fully absorbs before sunscreen. If you like the look of a little dewiness under makeup, a small amount of a light oil in the AM can do that — just keep it minimal.
How Much, and How to Apply
- Two to three drops for the whole face is usually plenty. More oil isn't more benefit — it's just more residue and more chance of makeup slipping or pores feeling congested.
- Warm it first. Dispense into your palm, rub your hands together for a second, and press the oil onto your face rather than rubbing it in aggressively. Pressing helps it absorb without dragging the skin.
- Damp or dry skin? Oil applied over a still-slightly-damp moisturizer layer can feel like it absorbs better and helps hold that moisture. On fully dry skin it still works — this is preference more than rule.
- To avoid a greasy feel, use less, choose a lighter (linoleic-rich or ester-forward) oil, and give it time to absorb before makeup or bed. A greasy result is almost always too much product or too rich a formula for your skin — not a sign oils "don't work" for you.
Not sure which oil suits your skin in the first place? Start with Non-Comedogenic Facial Oils if you're oily or combination, or Facial Oil for Sensitive Skin if your skin is reactive — then come back here for the how.