Hire a plumber and you pay for a repaired pipe. Hire a lawyer on retainer and you pay for the right to call her. Both are legitimate, both are common, and nobody confuses them, because everyone understands that one buys an outcome and the other buys availability.
Ghostwriting contains both, and most authors don’t know there’s a choice to make.
This matters more than it sounds. The billing model you agree to decides what happens when you travel for three weeks, when the business has a bad quarter, when your father gets sick. It decides whether a delay costs you money, costs your writer money, or quietly extends the project by four months. Worth understanding before you sign, not after.
What is milestone billing in a ghostwriting contract?
Milestone billing ties payments to delivered work. A deposit up front, then a payment when the outline is approved, another at the halfway point, another at manuscript delivery. Four or five payments, each attached to something you can hold.
Authors like it and the reason is obvious. You see a thing before you pay for the next thing. If the writing is wrong, you find out early and you’ve spent less. For a first-time author hiring a stranger for a large sum, that’s a real comfort and I don’t dismiss it.
It works well when the project runs to plan. Interviews happen on schedule, chapters come back reviewed inside a week, the outline gets approved when it arrives. Under those conditions milestone billing is clean, predictable, and nobody has a difficult conversation.
What is monthly billing, and what are you paying for?
Monthly billing prices the engagement by time. A deposit that holds your place in the schedule, then the balance divided across the months the project will take. Ten months, ten payments.
What you’re buying is a block of my working life. When I take your book, I’m not taking someone else’s during those months, because I run a small number of projects a year and each one needs continuous attention. That capacity is reserved for you on the day you sign, and it stays reserved whether you turn up for interviews or not.
That’s the whole argument. A book consumes months. Months pass regardless.
When does milestone billing break down?
So what breaks it? Here’s the scenario, and it’s the common one.
We’re three months in. You travel for a fortnight. Fine. Then a deal lands and you’re consumed by it for six weeks. Then the holidays. Five months pass and we’ve completed two interviews.
Under milestone billing, I’ve earned nothing since the outline payment, because no milestone has been reached. I held five months open for a project that produced almost nothing, and I couldn’t sell that time to anybody else, since books are booked months ahead and nobody arrives needing a ghostwriter to start next Tuesday.
Now look at it from your chair, because the damage isn’t one-sided. I’m five months unpaid on your project and I have a business to run. The pressure to take other work is real, and if I take it, your book slows further. Milestone billing quietly creates an incentive for your writer to deprioritise a stalled project at exactly the point you need him engaged.
Monthly billing handles the same five months without a conversation. The months happened. They were yours. The clock and the calendar agree, and when you resurface we carry on with no argument about what was owed.
What happens when the project runs long
Projects run long. Most of mine overrun because of the author’s schedule. That’s normal and not a criticism, since these are people with companies to run.
Under monthly billing there’s nothing to negotiate. The project needs three more months, those months get invoiced at the same rate, and the conversation takes one email. Neither side feels wronged, because the arrangement always said you were paying for time.
Under milestone billing an overrun is awkward. The remaining milestones are fixed, so the extra months are unpaid and someone has to raise it. Either the writer absorbs the loss or you get an uncomfortable request for more money against work you thought was already priced.
The contract language that prevents the argument is short: state whose delay extends the schedule. If the writer is late, payment waits. If the author is unavailable, the months continue. Put it in writing at the start and the awkward conversation never has to happen.
Which billing model should I choose for my ghostwriting project?
I offer both. Here is which suits which author.
Take milestone billing if your calendar is genuinely your own, you can commit to interviews at a steady rhythm, and you’ll review chapters within days of getting them. Also take it if this is your first book and paying against delivered work is what lets you sleep. That’s a legitimate reason and worth the tradeoff.
Take monthly billing if you run something that will interrupt you, if your availability moves week to week, or if you want the arrangement to survive a bad quarter without a renegotiation. Also take it if you’d rather your writer stay committed to your book while you’re dealing with something else, since he’s being paid to be available and he is.
One more consideration that authors raise and I think is fair: monthly payments are easier to plan against than four large ones. Several of my clients prefer the predictability and say so.
The clause every ghostwriting contract needs
Whichever model you choose, ask for this one, and be suspicious of any writer who won’t discuss it.
Define abandonment. After a stated period of no contact, mine is six months, the project is considered abandoned and the money already paid is not returned.
That sounds harsh until you look at both sides. I’ve had clients pay, promise to start next week, and disappear. Not one or two. Some of them are a decade gone now. One died during COVID. That’s a different silence, and a reminder that a writer never knows why somebody stopped answering.
Without that clause, my obligation to those projects runs forever. The money is neither earned nor refundable and the file never closes.
For you, the clause is protection of a different kind. It tells you the clock is real while there’s still time to do something about it. An open-ended arrangement lets a book drift for years, and the author who drifts is rarely happier for it. A defined boundary is what turns next week into this week.
What predicts a payment problem?
Two things, after enough projects to see the pattern.
The first is that the billing model matters far less when the author is engaged. Show up for interviews, review chapters when they arrive, and milestone and monthly produce nearly identical experiences. Every horror story about payment terms is downstream of a stalled project.
The second is that authors chronically underestimate their own availability, and not out of dishonesty. They plan around a normal quarter, and quarters aren’t normal. Something always happens. Choosing a billing model that survives the interruption is more useful than choosing one that assumes it won’t.
If you’re certain of your schedule, milestones are fine and you’ll save nothing either way. If you’re not certain, monthly protects the thing you care about most: the book gets finished by somebody who stayed on it.
For how the work itself runs, my ghostwriting hub covers the process from first interview to manuscript, and the pricing page carries the current numbers. If you’d rather talk it through against your own calendar, that’s what the discovery call is for.