I have never met a conventional lender that will approve a loan based only on trading income, which they consider investment income. A good accountant or CPA can advise you on what type of entity which would be easiest to form and administer. (Likely an LLC, if you are in the U.S.) From that, you will pay yourself a salary which will then be considered "earned income", and you will then file business/personal tax returns for 2 years, which you can then present to a lender.
Lenders, don't care how much you earn as a retail trader, because they all consider it 'investment income', no different than if you were a long term investor in IBM. And they know that investment income is not reliable, and can come and go. So they will not lend on it. Generally, they aren't stupid. (Yes, you can always find hard-money private lenders if you are really raking in the profits and need a loan, but you will pay a lot for their involvement.)
So for a conventional mortgage, you are forced to 'professionalize' your operation, make yourself an employee, and file 2 years of returns. Now, this in itself comes with some downsides related to employment taxes, fees, etc., which you need to cover with a CPA.
If this all sounds complex and bothersome, well, it is. Probably easier for you to rent, book your profits, then pay cash for a house.
In my experience, having gone through the process last year for a jumbo loan, this information is wrong. Really wrong.
To use capital gains/investment income to qualify for a mortgage, Fannie Mae guidelines, require two years worth of tax returns demonstrating the amount of income needed to qualify for the loan. My understanding, is that Fannie Mae guidelines are used as a basis for pretty much all residential loans - even for my jumbo/non-conforming loan that won’t be picked up by an agency, their guidelines were still used as a basis,albeit with some additional enhancements. (Not to say that just bc the guidelines will allow it, every lender will be willing to do it - but these people make their money by making loans, so if the guidelines support it, you can bet they’ll make a push to get their underwriting to approve it.)
In practice, some lenders will require three years worth of tax returns demonstrating the income, rather than just the two.
Most, if not all, underwriters will also require you to demonstrate that even after your down payment and closing costs, you still have an adequate amount of funds to continue generating at least the same amount of income (this part they don’t make a real science about, though).
Don’t get me wrong, they’re almost certainly going to drive you crazy given your line of work, especially if you have a situation that you’re trading from multiple accounts or anything which complicates arriving at your PnL. They’re going to want extensive amounts of bank statements and brokerage statements that will be uncomfortable providing to them for various reasons. But this stuff about ‘no conventional lender will give a loan to a trader’, is crazy. (Maybe circa 2009 it was like that? I wasn’t in the market then, so wouldn’t know.) I didn’t speak with a single lender that wouldn’t give me a loan.
Of course, speak with a CPA about this and your taxes in general, but don’t just go ahead and start forming LLCs based on the info provided above.
Here is the link to the FM guidelines about capital gains:
https://www.fanniemae.com/content/guide/selling/b3/3.1/09.html#Capital.20Gains.20Income
I fortunately was able to dig this out of my email from last year, an underwriter had sent it to my mortgage broker/banker who then forwarded it to me.
