I’m not convinced of additional expenses. Different, perhaps, but lots is entirely personal choice and will have far less impact on appearance of ageing than your genetic makeup.
My mother isn’t grey at 96. A few grey hairs but still brown to look at.
I spend more on hair cuts and colour now not because of ageing per se, but because I can afford and am in a more senior post so need to look less nuclear fall out than previously. I dislike hairdresser experience so minimise number of times I go. £140 about two or three times a year.
I use ordinary soap, shampoo and conditioner. I like quite nice ones - L’Occitane rather than Tesco’s own soap, but lasts forever and not silly money.
I slap on face moisturiser- Neals Yard at moment because it was a present and smells nice. I use a lot of hand cream. Jo Malone scent and body lotion, if I’m going out.
My clothes spend is less. I care not a fig generally, but have a strict work dress code. Dog walking comfort mostly, with a dozen or so work outfits and a few ‘going out’ clothes that I’ve had for a number of years. My clothes last a long time and I don’t do fashion; I think it’s the exact opposite of good taste, world friendliness and pro womanhood. Fashion is generally poor taste too.
Nails are just trimmed and kept reasonably short. Never had them done and actively dislike embellished, glittery talons.
My makeup bag is minimal. One each of foundation and concealer cream, eyeliner, mascara, and blusher. A couple of eyeshadows, three lipsticks. Had most for years. They still seem to do the trick.