So I’m not clear what you mean by “deduction” from your paycheck. You might be talking about a line item pre-tax deduction, a line item after-tax deduction, or a reduction in your take home pay from extra tax withholding, or a combination of all those things.
You say that your share of the premium increased by $20 per paycheck, that you think the employer share of the premium is $250 (but you don’t say if that is per paycheck or per month), and you say that you have a “deduction” of $273 per paycheck, but you don’t say how often you are paid. Can you clarify?
I’m trying to think about how to help you analyze your situation further while asking for the minimum necessary information. Remember that this is a public forum, so don’t post any identifying information like name or an address, and don’t post any information that you would not be comfortable with being public.
let’s try this: what is your gross annual salary, the amount of Social Security withholdings from your last paycheck before adding your partner and your most recent paycheck, and how often are you paid?
Or, perform the following calculations on your last paycheck before you added your partner and your most recent paycheck. Take the amount of Social Security tax and divide by 6.2%. that will get you the amount of earned income that you are being taxed on for that paycheck. (However, this calculation only works if your gross annual salary is less than $132,000. If you salary is higher there is a different calculation we can use.) For example, if your Social Security tax is $286, then your earned income on that check would be $4612.
Your Social Security tax should have gone up with the addition of your partner on your insurance. That translates into extra earned income, which is the imputed income that you are being taxed on, and which should be the value of the employer-paid part of the premium, if the employer is calculating it correctly. What is that figure?
(Your state and federal income tax withholding should also have gone up, but using the Social Security tax is the easiest way to figure out what the amount of imputed income actually is.)
