Looking on the internet deeply has found these results:

have something in hand is the most popular phrase on the web.

have somethingto hand 12 results on the web	have something in hand 11,430,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Look, when you have somethingto investigate, you know where I am. Then I'll have somethingto live for.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

have somethingto hand

12 results on the web

have something in hand

11,430,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.