The number a firm quotes over the phone is almost never the number you will pay by the end of the case, and the gap is usually legitimate rather than sinister. It exists because an immigration matter is assembled from three separate spending categories that happen to arrive in one envelope: the attorney's professional fee, the fees the government charges for filings and options like faster adjudication, and the costs of documents produced by third parties. A careful reader sorts the quote into those three piles before comparing it against anyone else's.
What belongs to the attorney and what belongs to the government
Attorney fees pay for judgment, drafting, and the willingness to be the person on the record. Government charges are set by schedule and are the same whoever files: the base petition fee, the fraud prevention and detection fee that attaches to certain H and L petitions, the asylum program fee that now rides along with some employer filings, and any premium processing request. Those figures change by regulation, so ask the firm to quote them as of the date you sign and to say in writing who remits them. A quote that folds everything into one round number is not necessarily overpriced, but it is unreadable.
The third pile is the one people forget. Certified translations of birth certificates, marriage records, and foreign transcripts are billed per page by a vendor. Credential evaluations, when a degree needs to be shown as equivalent to a US bachelor's, are a separate invoice from a separate company. Expert opinion letters, when a specialty occupation argument needs support, cost more again. Some firms coordinate these and pass them through at cost; others expect you to arrange them and hand over the results. Both approaches are fine, and knowing which one you have bought changes your budget by a meaningful amount.
Flat fee, hourly, and what each one hides
A flat fee buys predictability and shifts the risk of a complicated case onto the firm, which is why flat fees are usually quoted per filing rather than per outcome. The question to press is what counts as one filing. An H-1B petition with a labor condition application, a dependent H-4 for a spouse, and two children is four things, and a flat fee written loosely can be read as covering one. Hourly billing removes that ambiguity but introduces another: you will want the increment, the rate for paralegal time, and whether emails and phone calls are billed. Ask for an estimated range in hours, and ask what has historically pushed a case past it.
The exclusions that generate the second invoice
Most retainer agreements exclude, by name, responses to requests for evidence, motions to reopen, appeals, and consular processing after an approval. None of that is unreasonable, because a request for evidence can require a week of drafting that nobody could price at the outset, but the exclusion needs a number attached. Ask whether a response is quoted flat or hourly, and ask for the firm's typical figure for a case like yours. Ask the same about a request that arrives on an already-approved extension. The point is not to negotiate the exclusion away. It is to know the size of the thing you are agreeing to pay for later.
Read the withdrawal and refund language with equal care. If you leave the employer mid-case, if the company withdraws the petition, or if you change your mind about adjustment of status, the agreement should say what portion of a flat fee has been earned at each stage. Look for how the file is transferred, whether copies cost anything, and how quickly they arrive. The Department of Labor oversees the wage and condition attestations that sit underneath many employment-based petitions, and those filings have their own timing, so a clean handoff matters more than it sounds.
Questions worth asking before you sign
Ask for the total out-the-door figure including government charges, itemized. Ask who pays for premium processing if the employer declines it and you want it. Ask whether dependents are included, and at what price if not. Ask what triggers additional billing, and get one example. Ask who will actually do the drafting, and who answers your questions. Finally, ask for the fee agreement in advance rather than at signing, and read it somewhere other than the conference room, because the exclusions are always in the second half.
A firm that answers those six questions in plain figures has already told you most of what you need to know about how the rest of the case will be handled.