It can vary a lot. I think $10k is a generous signing bonus if it comes in addition to relocation. $15k is around the smallest lump sum relocation I would consi

It can vary a lot. I think $10k is a generous signing bonus if it comes in addition to relocation. $15k is around the smallest lump sum relocation I would consider reasonable though. Some firms offer > $30k signing bonuses (some more than double that) independently of relocation. It's rare, but not exceedingly rare.