how far ahead to get hotel in Paris? thank you

you are already a big late -- as soon as you get your dates, book your hotel. We already have our reservations for September next fall.

2 months ago! Seriously, find something in a good location in your budget ASAP and lock it in. Your going to find the best rooms/rates are already booked.

In my experience, rates never go down later. This is Paris, probably the most visited city in the world. Book asap.

I am going to be in Paris in May and booked hotel months ago,

I monitor prices and thay do not go down just as others posted.

I use booking.com. Some member like booking while others don't. However you can use it just for research and do not need to book through them.

As soon as they're available. I booked mine in December for May.