Most fragrance sold on the high street is alcohol based. The scent is dissolved in alcohol, you spray it, the alcohol evaporates within seconds and carries a good deal of the fragrance up into the air with it. That first burst is the part people fall in love with in a shop.
Perfume oil skips the alcohol entirely. The same aromatic materials are carried in a light oil base instead. It changes almost everything about how the fragrance behaves.
The opening
An eau de parfum opens loudly. You get the top notes all at once and within twenty minutes they are gone. An oil opens quietly and stays where you put it. There is no cloud, which some people miss at first and most people end up preferring.
How long it lasts
Oil generally wins here, and not by a small margin. Because nothing is evaporating off, the fragrance is released slowly as your skin warms it. A well made oil applied in the morning is usually still present in the evening. An alcohol based scent at a similar concentration often wants topping up by lunchtime.
Skin type matters too. Dry skin burns through any fragrance faster, which is why moisturising first makes such a difference.
How far it travels
This is the honest trade off. Sprays project, oils mostly do not. If you want to be noticed from across a room, alcohol does that better. If you would rather people only catch your scent when they are close to you, oil is exactly right. It reads as more personal, and it is far less likely to bother anyone in an office or on a train.
How it feels on skin
Alcohol is drying, and on skin that is already sensitive or freshly shaved it can sting. Oil tends to be gentler and moisturises slightly as it goes on. That is a large part of why alcohol free fragrance has grown so quickly over the last few years.
Worth being straight about it though: alcohol free does not mean irritation free. Fragrance materials themselves can cause reactions no matter what carries them. If your skin is reactive, patch test first.
How the scent develops
Oils tend to hold their shape. A spray moves through its top, heart and base notes fairly dramatically. An oil gives you something closer to the heart and base from the start, and it shifts gradually rather than in stages. Resinous and woody materials in particular sit beautifully in oil, which is why oud, amber and sandalwood blends are so often made this way.
Travel and waste
Small oil bottles pass airport security without fuss and there is nothing to leak into a bag the way an atomiser can. You also waste far less of what you paid for. A spray sends a fair percentage of every application straight past your body and onto the floor.
So which should you choose
Sprays for a big entrance, oils for everything else. In practice, plenty of people end up wearing oil day to day and keeping a spray for occasions. If you have never worn one, begin with something familiar like a musk or a vanilla before moving into heavier territory.
Our oils are blended and bottled by hand in the UK and all of them are alcohol free. There is more on getting the most from them in our guide to applying perfume oil.