It is not uncommon to see a sign that says (in Chinese) RMB, HKD, MOP same price. Example.

My recommendation is that you just change your HKD (or RMB) to MOP -- there are money changers all over the place (at least in the touristy areas, which is where you'll probably be).

Occasionally someone might be willing to round things down a little - example: a taxi driver took 25 HKD for a 25.50 MOP fare. And occasionally if you try to pay using RMB, they'll ask you if you have MOP (RMB being worth about 30% more). But for the most part they'll be happy to absorb any surplus if you try paying by HKD or RMB. (Edit: Unless you are prepared to be extremely aggressive about it, as is the wont of some mainlanders.)

It is not uncommon to see a sign that says (in Chinese) RMB, HKD, MOP same price. Example.

My recommendation is that you just change your HKD (or RMB) to MOP -- there are money changers all over the place (at least in the touristy areas, which is where you'll probably be).

Occasionally someone might be willing to round things down a little - example: a taxi driver took 25 HKD for a 25.50 MOP fare. And occasionally if you try to pay using RMB, they'll ask you if you have MOP (RMB being worth about 30% more). But for the most part they'll be happy to absorb any surplus if you try paying by HKD or RMB. (Edit: Unless you are prepared to be extremely aggressive about it, as is the wont of some mainlanders.)

Edit 2: At Royal (来来) Supermarket, there was a sign stating the RMB to MOP and HKD to MOP exchange rates. That was the only place I came across which had such an officially posted notice. If I recall, the rate there was 1 RMB = 1.18 MOP; this is an improvement on the usual 1 to 1 at other places, but still considerably worse than the fair market rate.

It is not uncommon to see a sign that says (in Chinese) RMB, HKD, MOP same price. Example.

My recommendation is that you just change your HKD (or RMB) to MOP -- there are money changers all over the place (at least in the touristy areas, which is where you'll probably be).

Occasionally someone might be willing to round things down a little - example: a taxi driver took 25 HKD for a 25.50 MOP fare. And occasionally if you try to pay using RMB, they'll ask you if you have MOP (RMB being worth about 30% more). But for the most part they'll be happy to absorb any surplus if you try paying by HKD or RMB.

It is not uncommon to see a sign that says (in Chinese) RMB, HKD, MOP same price. Example.

My recommendation is that you just change your HKD (or RMB) to MOP -- there are money changers all over the place (at least in the touristy areas, which is where you'll probably be).

Occasionally someone might be willing to round things down a little - example: a taxi driver took 25 HKD for a 25.50 MOP fare. And occasionally if you try to pay using RMB, they'll ask you if you have MOP (RMB being worth about 30% more). But for the most part they'll be happy to absorb any surplus if you try paying by HKD or RMB. (Edit: Unless you are prepared to be extremely aggressive about it, as is the wont of some mainlanders.)