Will he have to be making enough for his wife aswell as me? They both work so I'm not sure if what difference that makes.

Sponsor's minimum income requirement is 125% of poverty level for their own household plus the intending immigrant. It's not clear whether "me" above is the immigrant or USC.

He needs to make enough to support however many people are financially dependent upon him.
For instance, if you are a dependent, his other child is, and your fiance will be, he needs to meet the criteria for supporting a household of four (you, the other child, your fiance and himself).
If you aren't a dependent of his, then he doesn't need to support you. If his wife isn't a dependent of him then he doesn't need to include her either.

Well, my fiancee (USC) and I wont be living with him and his wife, we just need him to sponsor me. So he'd only need to be making enough for himself and me, right? His wife works so she's not a dependant of his.

His wife counts too. As I told you, the number is his household plus the intending immigrant, so in this case it is three.

Thank you.

I'm still confused

I thought the sponsor only had to account for the people who are dependant on him/her. So, for example, if a sponsor was 18 and still living at home with 4 other people, would they have to account for all those people plus the applicant? Or just themselves and the applicant, if no one else depends on them financially.

I guess it depends upon who all he counts while paying his taxes, that's how you count the sponsor's household member, so if he and his wife files joint sponsorship then he needs to earn what is 125% of 3 people (him, his wife, and you).

Size of the household will increase if he has dependent children and how many children.

Hope this helps you

The sponsor has to account for the number of people in their "household". In this context, "household" means the sponsor, their spouse if they have one, and any dependents, including the intending immigrant, no matter where they live.

That makes sense. So, it's not household in the literal sense, but just the dependants of that person? I feel kinda slow

Can anyone help me with the above question?

The way I have always interpreted it (and if I'm wrong someone correct me) is this:

Let's say this scenerio:

You are being cosponsored by a married man with 2 kids. The household size you would look at would be for 5 people (assuming his kids are dependents as stated in his last tax return). It would be him, his wife, their 2 kids, and you. Even though you don't live in his "house", he still has to make enough technically to support you plus the people who are already dependent on him.

Hope I didn't confuse you further. I hope everything works out for you. We were also worried about I-134 back when we were going through the K-1 process. Since I was still in college (I'm USC), we had to wait over a year until I could graduate and find a good paying job before we could file. It was hard, but looking back I think it worked out for the best. Since I don't know alot about your situation, I can't say alot. I just wish you the best.

-Jamie

From the I-864 Instructions, page 2 http://www.uscis.gov/files/form/I-864.pdf

How Do I Count Household Size?
Your household size includes yourself and the followingindividuals, no matter where they live: any spouse, anydependent children under the age of 21, any other dependentslisted on your most recent Federal income tax return, allpersons being sponsored in this affidavit of support, and anyimmigrants previously sponsored with a Form I-864 or FormI-864 EZ affidavit of support whom you are still obligated tosupport. If necessary to meet the income requirements to be asponsor, you may include additional relatives (adult children,parents, or siblings) as part of your household size as long asthey have the same principle residence as you and promise touse their income and resources in support of the intendingimmigrant(s).