Thanks to a link over at Lazy Man and Money I found this Immediate Annuities site that gives easy and quick quotes on annuity payouts. The site gives you quick figures on payout rates for immediate annuities. Previously I've looked at annuity figures on the Vanguard site but its a little hard to find their annuity quotes there.
I ran the calculations for a few ages on an premium of $100,000 and came out with sample figures for a few ages. For a $100,000 purchase you would get monthly payout rates in the $500-$700 range. It varies based on age and sex. If you get a joint payout for a married couple then it will pay out less but it will pay benefits for the life of both spouses. For the joint payout I assumed that the spouses are the same age. Spouses of different ages will have different payouts but you can run the numbers yourself at Immediate Annuities site. These are just sample quotes and theres no guarantee you'll get these payouts. You may find better or worse payout through other sources. Your exact health condition and state you live in may impact the quote you get.
Monthly payout figures for $100,000 annuity purchase:
Or as a % annual payout from the initial premium cost:
So in other words if you are a 40 year old male and buy a $100,000 immediate annuity then you could get $534 a month. That is $6,408 annually which equates to 6.4% payout from your initial $100,000.
Keep in mind that these annuities have no inflation adjustment. Personally I'd recommend looking into annuity with a cost of living adjustment built in. Also the joint payouts are for 100% payout to surviving spouse. I don't think 1 person needs 100% as much as 2 people so you could go with a 66% or 75% payout rate instead and get a better benefit payout.