If you subtract that from your rental income your property itself is probably negative cash flow.

@Chris - I think I understand what you say, but why would they subtract rather than add 1 day of interest?

On a flip, take your After repair value and subtract your rehab costs, minute the percentage you'd like to make on the deal.

From Biz findings "For losses of trade or business property, or property used to produce rentals or royalties, once you've calculated the amount of your loss and subtracted the amount of your reimbursement, the remainder is your deductible loss (or gain)."

Then subtract the $124,000 and you're left with $12,000.

The COC ROI will be 14.88% and the monthly cash flow will be $535.95 after subtracting for vacancies, repairs, cap ex, taxes, insurance and P & I. 

If it is $250k then subtract the $45k leaving $205k divided by 2=$102,500 equity each.

Don't forget to subtract selling costs, transfer tax, and interest payments to arrive at your "true" profit.

You can subtract the amount of the debt from the net sale and only purchase that much. 

I have a private money lender questionnaire that I was able to put together but thought it would be a great idea as a finishing touch from the great minds of the biggerpockets community to give me some input on what to add or subtract from the these questions.