If you have all the information needed the adp calculator adp paycheck calculator will be very close. While you may have more taken as a deduction on larger then normal paychecks, OT is still taxes like normal income at the end of the year when filing your tax returns. OT is almost always worth it if you want any additional income and don't mind working the extra time. More on reddit.com

Mid-career SPEEA childless bachelor in WA (rough numbers)- Gross $130,000 Fed Taxable Gross $120,000 Total Taxes $32,000 (26.6% of taxable) Total Deductions: $22,000 YTD Net: $76,000 -- 58.4% of Gross General advice applicable to all is to squeeze money into various retirement savings and safety-net savings (Boeing 401k, IRA's, Bank Savings Accounts that you don't touch, etc.) until your Net Pay starts to hurt your lifestyle (in my case, a rough sentiment would be only affording a domestic vacation rather than an international vacation each year, which I'd love to do, but can live without for a few years). I also put away $200/pp into my saftey-net savings account, and generally maintain ~$25,000 (roughly 6 months living expenses), dipping into that for ad-hoc car/home maintenance, or unexpected travel expenses. Apart from the practical effect of building a good retirement nest egg...for young folk who have not purchased a home, had a child, or encountered other lifestyle events, this sets you up to give yourself breathing room down the road. Dial your contribution back from 20% to 15% and voila, you've got yourself a pseudo 5% take-home raise to meet that mortgage or buy those diapers. More on reddit.com