Immigration work is usually flat fee, which means scope creep does not quietly show up on a bill. It shows up as a conversation you have to initiate. That makes the timing of it the whole game.
The expansions are predictable. An RFE arrives. A client's role changes mid-case and the original argument no longer fits. The evidence turns out thinner than intake suggested. A second criterion has to be built from scratch. None of these are surprises to me after 4,000-plus matters, so I stopped treating them as surprises in the engagement agreement.
The term that reliably prevents fee surprises is naming the triggers up front with prices attached. The agreement lists what is included, then lists the specific events that fall outside it and what each costs: response to a Request for Evidence, response to a Notice of Intent to Deny, refiling after a material change in the beneficiary role, and adding derivatives. The client sees those numbers on day one, when nothing has gone wrong and nobody is anxious.
That converts the hardest conversation in the practice into a reference check. I am not asking for more money. I am pointing at a term they already agreed to. Trust survives because they were told before it was relevant rather than after.
The conversation move is separating the news from the money. When an RFE arrives, the client hears one thing: something is wrong with my case. If I deliver that and the fee in the same breath, the fee becomes part of the bad news, and I look like I am charging them for a problem. So the first conversation is only substantive. Here is what USCIS asked for, here is what it means, here is what it does not mean, here is our position. Then, at the end or in a follow-up: this falls under the RFE response term in our agreement, the fee is X, and here is the timeline.
Same information, entirely different reception.
One thing I would tell any managing attorney: do not absorb the extra work quietly to avoid the conversation. It feels generous and it is corrosive. Your staff learn the boundary is decorative, the client learns scope is negotiable, and the resentment surfaces later in a worse form. If the work falls outside scope, say so at the moment you discover it. The client can handle a fee. What they cannot handle is finding out weeks later that you have been unhappy about it.