I'm bringing in $4K a month right now working for this firm. So I'm assuming based on the above approximations that I'll be making significantly less every month working for the USPTO.
you are looking for an answer no one can give you straight out, because here are the various (many) variables.
Pay Grade: 7, 9, 11?
Pay Step: 10, 7/8, 1?
Annual TSP Contribution %: This can be 0 to 5%, your choice
Federal Tax Exemptions:
State Tax Exemptions: Are you going to live in Virginia, DC, or Maryland?
Filing status: Single, Married, Head of household
Are you gonna have a HSA or FSA?
Insurance: Health, Dental, Vision, Life?
Do you have property?
Other deductions? Kids, parents, etc?
That being said, the only way to truly compare is not to look at the monies after tax, but pre-tax. Unless i am your CPA, that answer is impossible to give out right now, there are too many variables.
reasonably, you can expect to make 100-110 in your second year (with near max overtime each bi-week) and have a very comfortable work/life balance, even more so when you can hotel.
years 3 and beyond just increase it slightly until you are hitting 120-130+ and working from home.
that being said...here's a sample for you i guess.
Fed Tax Exemption: 2
State Tax Exemption: 2 (Virginia)
Filing as Married
Health Insurance per biweek: 92 (on the cheaper end probably)
No life insurance, extra dental or extra vision.
No HSA, FSA, Property or other deductions.
Biweekly pay after taxes: about $2050 it seems or about 4400 per month.