Monopoly Mortgage Rules Explained (and When to Use Them)

Mortgaging is the most misplayed button in Monopoly. Players treat it as a shameful last resort, then go bankrupt holding a wallet full of unmortgaged property. Used deliberately, a mortgage is just a loan from the bank at a known interest rate, and sometimes it is the correct play.

The rules in one minute

• Mortgage a property and the bank pays you half its printed price. A $2,000 property yields $1,000.
• While mortgaged, the property collects no rent. Your opponents land there for free.
• You can only mortgage bare land: any houses on the group must be sold back first.
• To lift the mortgage you repay the mortgage value plus 10 percent interest. That $2,000 property costs $1,200 to reactivate.
• The property still counts as yours for set ownership, but a set with a mortgaged member does not collect double rent on the others.

That 10 percent is the whole business model. Mortgage and quickly unmortgage and you paid a small fee for temporary liquidity. Leave it mortgaged forever and you sold the property for half price.

One twist in our version: the mortgage timer

In Monopoly Online a mortgage is not eternal. You have 7 rounds to buy the property back. If the timer runs out, the property goes to a forced auction and anyone at the table can take it from you at a bargain. The countdown is shown on the card, and the point of the rule is pacing: it stops endgames from freezing into a museum of mortgaged monuments nobody can afford to revive.

So in this version a mortgage is explicitly a short-term loan. Take it when money is coming back soon, not to park a corpse.

When mortgaging is right

• To finish a monopoly. Mortgaging two stray singles to buy the card that completes your orange group is nearly always correct. Houses on a full set out-earn raw land by an order of magnitude.
• To survive a spike. One brutal rent should not force you to sell houses. Selling buildings returns half price and destroys income; a mortgage is the cheaper bridge.
• To deny in an auction. Mortgage capacity is bidding power. Winning a set-completing auction with mortgaged money usually beats staying pretty and letting the set go.

When it is wrong

• Mortgaging income to buy vanity. Do not silence a working railroad to grab an expensive single you cannot build on.
• Mortgaging into a developed board with no plan to repay. You are paying 10 percent to delay a bankruptcy that arrives anyway; consider a trade instead while your cards still have negotiating value.

The deeper rent math behind these calls lives in our property rankings, and the rent calculator lets you check any what-if in seconds.