Hello,
Ive been passively selling on my ebay and vinted accounts for years now but never substantial amounts (under £1k a year combined). However, over the last year or 2 my ebay and vinted have increased - in the 2025/26 tax year I made around £5k in sales between ebay and vinted and I want to ensure im ready for Self Assessment.
My ebay and vinted accounts have transitioned from me just selling my own personal items - to both selling old personal items and selling products for a profit on the same account. (I understand it is best to keep the sales of personal items and stuff im selling for a profit separate, but it is too late for this now)
I've sold alot of items which I have previously received from bundles which at the time was bought for personal use. Years later I ended up selling some items which I did not use - I did make money on these bundles but these items were bought long before the intention of resale so I have minimal information on what was included in these bundles and purchase dates (just a rough idea of what came in which bundle)
Ive started working on spreadsheet to calculate the profit/loss and generally keep records of sales. But i feel like I am growing more and more uncertain on how I manage this situation - I just dont know where I really start/ how to manage this to make sure I Self Assess correctly?
Any advice given is greatly appreciated - Thank you!