IMO its not worth taking any more than £35k a year in wages anyway. The amount of tax you start to pay when it nudges £40k and the self employed payment on accounts is a killer at that level for small sole trader businesses, assuming of course you report your earnings accurately.
This is why i went LTD, my business is set to turn over an actual real throughput of £55k of real cash by the end of March, not based on a customer list, this is actual accounts which is quite different. I get 15 grand a year, the misses the same on PAYE..bills paid no worries.
Rest of the money stays in the business, i can draw some dividends down if i need to and more importantly my business is separate from my personal taxation. Still only working 4 days a week also, and at around £58k on my customer list (its gone down a bit due to some halted customers)..
Tax is a mare, especially paying on account. I also hate having to pay in July as well.
Thinking of going Ltd myself, but only if the wife stops working so she can be take some of my wage to reduce tax.
Shouldnt matter if the wife is still working, its still going to be better for you to go LTD.
If you are turning over more than £35k a year as a sole trader, you really are at the limit of what you can do and will start to pay too much in tax, but more importantly you will become a target from HMRC, as I was.
if you go Ltd, Take a PAYE salary (dont just take the 11500 allowance, take same wages where you pay some tax, that way you will build up NI contributions and your state pension will be worth more) Take what you need to live on, and if you need extra money for whatever, you have a dividend allowance which is tax free, and you can even borrow money from your own company and use it like a credit card if you really have to. PAYE is easier, as your company will pay the tax for you at source of wages, no payments on account. Corporation tax is only 19 percent and that's due to go down again, plus no payments on account for that either.
Only downside is accounts and accountants, fees can be high especially in the 1st year of transfer from sole trader to ltd status if done correctly to the book..