Posted by JohnBoy on March 17, 2001 at 23:46:47:
On a month to month you only need to provide a letter stating the rent will increase to x amount on the following month. You must give a full 30 day notice before being able to charge the increase. Since this is the middle of the month now and assuming your rent is always due on the first, give your 30 day notice BEFORE April 1st so the increase can become effective by May 1st.
If you give notice after the 1st, then they will have until the 1st of the following month before you could enforce the increase. So you may just want to go ahead and send them a notice now that the rent increase will take effect as of May 1st. This gives them about 6 weeks notice.