The exposure is the repayable amount plus the difficulty that repayment is often calculated on the gross figure while the applicant received a net one after withholding. Ask how the amount is computed, whether it is prorated over time, and how tax already withheld is handled.
Ask how the repayable amount is calculated
A clause requiring repayment of the bonus can mean the full gross amount even though a smaller sum was actually received, leaving a shortfall to fund personally. Ask for the calculation in writing and whether it reduces over months of service. Separately, budget for two short legal reviews, one on the contract and one on the immigration route, which is usually modest against the sum at risk.
Retrieval comes first, because translation and evaluation both work from the underlying document. The duty description is where a documentation role most often runs into trouble, so reviewing the employer's draft letter is usually the most useful early expense. Check current amounts against the published USCIS fee schedule rather than any figure quoted in conversation. Build the budget from the chosen process and the proof that this particular occupation requires, then mark every amount as governmental, professional, or personal.