What new mandatory EXPENSES are there in retirement, apart from increased medical costs?

I've been retired since age 50 and I know I spend a lot less than when I was working. I don't spend much on clothes, shoes, gas, or eating out anymore. Of course everything increases in price every year like taxes, insurance, food, medical expenses, well everything really. Some added expenses I have are maid service and handyman services (used to be able to do that stuff myself). What I have found is that if you want to live the same lifestyle you need to have the SAME income that you have now. Our investment income plus social security and a pension total almost as much as when we were working. Medical expenses are the biggest cost that we have; my insurance was cancelled when they found out I had diabetes and the medication costs around $500.00 a month and each doctor visit is also $500.00. My husband has medical insurance through his old employer and it is just a supplemental policy, but that has gone up two or three hundred every year so far.

The "experts" are suggesting that you want don't want to decrease you style of living - which for most of is accurate.

you have medicare, which should result in lower medical costs

What costs do you have now that you won't have then?

There are no new costs except what you spend to keep busy and medical insurance. You will have a lot more time to fill.