Is the above structure grammatically correct, or just sort of common, or not correct but common enough to use?
closed as off-topic by Edwin Ashworth, FumbleFingers, Chenmunka, tchrist♦, Misti Feb 26 '15 at 13:49
This question appears to be off-topic. The users who voted to close gave these specific reasons:
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OED's entry for the specific phrasal verb is definition 1e under plan...
verb, intr. colloq. to plan on
to intend to carry out (some action); to anticipate or be prepared for.
...for which their first citation is...
1914 E. R. Burroughs Tarzan of Apes xxvii. 370
She is planning on our going up there the first of the week.
It's a perfectly common usage today, and the fact that a well-known and competent writer used it over a century ago suggests to me it's pointless debating whether the usage is "grammatical" or not.