For the person being hired this is a tricky situation. Specially with the new laws. There is no real magic number that can be applied as a lot will depend on what benefits you want, and what is actually available. This will really shift the spectrum quite a bit.
Under the affordibal care act, everyone has to have insurance or pay a ?fine? (were really not sure what to call this yet) but there are two provisions that really mess with the numbers you look at as an employee.
First, the cost of heath care has skyrocketed. So the same benefits that you had 5 years ago now cost maybe 10-15 times as much as they used to. This gets swept under the rug a bit because the "main costs" of insurance has only increased a tiny amount. What this actually comes down to is does your new ACA approved heath plan cover exactly the benefits you need, or does it cut corners.
Sorry this is complicated, and I don't mean it to come off as a speech against the ACA so I will give an example. My wife has RA, she really has it under control with the help of her RA doctor. This is not something she ever wants to change. Because she has had RA from the age of 15, and because it's degenerative, she doesn't want to spend 5 years working with a new doctor to get to the same place she is with her current doctor. In addition, the main drugs she takes for RA are not covered under any ACA plan, nor are the "substitutions" that her doctor makes (we are trying to have kids so she has to be off the main meds, and a couple of the things this doctor has tried has been meds that reduce inflammation, are pregnancy safe, but are not for the treatment of RA)
You now have to take into effect rather the cost of health insurance + the cost of the things now not covered by the heath insurance + the out of pocket expenses is worth the insurance.
Second the ACA has set up provisions to straight up trick those people that have lower income and are not paying close attention. When shopping for insurance, they get quotes like "$50 a month" or "$100 a month". The truth is that the remainder of the actual cost is deducted from their tax returns. This takes consideration, because if you thing your paying $50 a month for insurance but your really paying $650 then you need to make sure your doing your math right.
Finally, you need to understand how messed up things are right now in the US with heath care. Largely this goes unreported. I'm not really sure why. But in order to do this I will have to give examples.
For my wife to see a specialist (her RA doctor) the co-pay is $75. So she goes to the doctor, he charges her $75 and bills the insurance $200. The insurance pays the doctor $50. With out insurance, the visit costs $50. At first you want to blame the doctor for cheating the system, but the doctor has to pay for hours of labor to get the $50 back from the insurance company. From the doctors perspective it's cheaper to take the $50 then it is to charge the insurance company. And by charging the insurance company he has no control over the cost of the co pay. He essentially has to charge more to make the same money and the patient gets the shaft in the process.
Another example, I got strep throat last year. I went to the walk in clinic, paid $75, saw the doctor got my Z-Pack for $15, went home crawled in bed and got better. My wife (who still had separate insurance from before the marriage) got strep throat (imagen that) went to the same clinic, they charged her $200 for the visit ($50 co-pay) and $250 for the z-pack ($3 co-pay). The insurance paid the clinic $90 for the visit and $3 for the drugs. Again the patient is left out in this scenario. In this case it worked better for my wife, unless you account for the fact that to get that coverage she had to pay $650/month.
My point is that when comparing costs of heathcare with insurance, and without out insurance, its often times much cheaper for the practices to have you self pay then it is for them to go through the loops of trying to insurance to make them whole. This creates two rates. Self pay rates and Insured rates. When your trying to figure out the cost of not having insurance then you need to use the self pay rates. These can be vastly different.
So as an employee you need to figure out your cost of heath care with insurance, and your cost of heath care without insurance. Then user those numbers when your trying to negotiate a salary. The problem is that there is no magic number to use for this because the cost will very a lot. For us, it was cheaper to not have insurance. Even with a pre-existing condition that takes constant attention, it's just better if we set aside $500 a month then it is to try to pay $750 a month. That might not hold true for everyone. For some people or conditions it may be better to pay the $750 then to try to handle it themselves.
So for my negotiations I would go with x+$6,000 without insurance or x+$4,500 with insurance.
Now as an employer it's a lot simpler. Usually you have a "group plan" that offers you a pretty straight $x per year per person or $y per year per family. So you can offer exactly that. Salary - $x or Salary - $y. AS a starting point. However this is where negotiations start.
If your offering me $50,500 and insurance, I would rather just have $57,000 and no insurance. Of course your real cost is only $55,000 cause you don't care about my heath care costs only about insurance costs. So you try to negotiate down towards $55,000 and no insurance. But that's not good enough for me. So I either go else where and you loose talent, or I accept $50,500 and insurance (or somewhere in between).