What are the typical monthly expenses for a Sinkie?

[Americano]

but it's still money what... consider as part of expenses?

Yes.
I believe everyone has forgotten about all the annual fines.
Property tax
Income tax
Anymore???

Hahaha. You are not very law-abiding. 

[Stallion]

Ofcourse I am law abidding.
I pay my property tax and income tax punctually.
Even road tax also.
My road tax coincidentally also due in April, which make my expense every year in April the highest.

[PowerPuffGirl]

Me too..Insurance also due tis timing. Sucks!

[Americano]

Latest List

Housing Related
1. SC & C       
2. Utilities
3. HDB Loan - check ur statement and see the interest u are paying. easily few hundred per month!
4. Renovation

Monthly Bills
5. HP
6. Internet connection
7. Parents
8. Insurance

Car related
9. Season parking             -
10. Petrol                        |
11. Road tax                     |
12. Car insurance              |-- Better to go on public transport
13. Maintenance               |
14. Car mthly instalment     |
15. Coupons                     |

Annual Renewal
16. TV license
17. Radio license
18. Maid Levy
19. Income tax (Only apply to 1/3 of Sinkies)
20. Property tax