Beyonce and Jay Z can’t always get what they want — they’ve been unable to find the perfect L.A. home to buy … so, instead they haggled their way into a rental for $150K a month … and yes, that’s a deal.

They’re familiar with the crib in ritzy Holmby Hills — it’s the same one they rented last summer on a short term lease … but our real estate sources tell us they just locked it down for a full year.

We’re told the power couple’s been itching to move out of the Bev Hills area hotel where they’ve been living while house hunting — so they decided to go back to their old digs.

16,000 sq. ft., 7 bedrooms, 9 bathrooms and an infinity pool with a waterfall … is one helluva plan B.

You’ll recall, Bey and Jay paid $200K/month for the pad last year — but we’re told they dealt directly with the owner this time and knocked off $50K/mo. … based on signing a longer lease.

Even the Carters love a discount.