Assignment Fees by Deal Size: The Math, Not the Hype

The hype version of this question

Search for what an assignment fee should be and you will get two kinds of answers, both confident and both useless. The first is a flat number presented as normal — as if a fee that fits a $500,000 house also fits a $120,000 house. The second is a percentage presented as a rule — as if multiplying the wrong base by the right percentage fixes anything. Neither answer survives contact with an actual deal, because neither one starts where the fee actually comes from. We are not going to give you a third version of either one. There is no honest average we can quote you, and anyone who quotes you one without asking about the house is selling you confidence, not math.

Here is the unglamorous truth this whole post hangs on: your fee is not sized by the deal's price tag. It is sized by the spread — the distance between what your end buyer can pay and what your seller will accept. Big houses usually carry bigger spreads, which is why fees tend to grow with deal size. But they grow slower than the price does, they shrink the moment repairs grow, and they vanish entirely on plenty of expensive houses. The ladder below shows all of that with real arithmetic. Every figure in it is an example, labeled as such — your market, your buyers, and your house produce their own.

The one formula that sizes every fee

Run any wholesale deal through our Wholesaling Calculator and the chain is always the same three steps. First, the buyer's max: (ARV × buyer's factor) − repairs. Second, subtract your assignment fee. Third, what is left is your offer to the seller. That is the entire sizing mechanism. Your fee does not get added anywhere; it gets carved out of the middle, and the size of the carve is limited by how much middle there is.

Which means a fee question is really two questions. How much spread does this property carry — buyer's max minus the seller's real floor? And how much of that spread do you need to take for the deal to be worth your time, your earnest money at risk, and your name on a contract? The first question is arithmetic. The second is judgment. The hype answers skip the first question entirely, which is why they fail: they size the fee before measuring the only thing that pays it.

The ladder: four deal sizes, one set of rules

Here are four example houses, each run through the Wholesaling Calculator at the same 70% buyer factor, with the fee set at a level each deal can actually carry. Read down the columns and watch what moves and what does not.

Now the part the hype never shows you. The ARV climbs from $120,000 to $500,000 — more than four times — while the workable fee climbs from $5,000 to $20,000, exactly four times on these examples but from a much smaller base, and only because repairs stayed proportionally tame. Measured the honest way, against the buyer's max the fee is actually carved from, the fee barely changes at all: 7.2% of the buyer's max on the small house, 9.1% on the mid-size, 8.9% on the large, 7.7% on the extra-large. Against ARV the picture is the same: 4.2%, 5.0%, 4.7%, 4.0%. The fee did not scale with the price. It hovered, because what actually grew up the ladder was the dollar spread, and the fee stayed a single-digit slice of the number that pays it.

That hovering is the whole lesson. If fees truly scaled with deal size, the extra-large house would carry a fee four times the percentage, not roughly the same percentage on a bigger base. Deal size matters — of course it matters, $20,000 is not $5,000 — but it matters through the spread, not through the price tag, and the spread has a second parent nobody puts on the poster: repairs.

Repairs: the silent fee-setter

Take the large example and change one input. The buyer's contractor walks the house and prices repairs at $65,000 instead of $55,000 — a $10,000 disagreement about a roof and a sewer line, the most ordinary argument in this business. The buyer's max falls dollar for dollar, from $169,000 to $159,000. Your contract at $154,000 plus your $15,000 fee was built to land exactly on the old max. On the new max, the deal is $10,000 underwater before anyone argues about your fee at all.

This is why experienced wholesalers talk about fees and repair estimates in the same breath. Every dollar of repair you understated comes out of the spread, and the spread is where your fee lives. On a small deal the effect is brutal because there is so little room: run the thin version — ARV $110,000, repairs $28,000, buyer's max $49,000 — and if the seller's floor is $47,000, the entire spread is $2,000. Type a $7,500 fee into the calculator out of habit and your offer prints $41,500, a number the seller was never going to accept. There was no fee decision to make on that house. There was only a walk-away decision, and the math made it in about four seconds.

Trap one: the flat fee

The flat-fee habit — "my fee is $10,000, period" — sounds like discipline and behaves like a blindfold. Run that same $10,000 across the ladder. On the small house it is 14.5% of the buyer's max, and your offer drops to $59,000: a price cut the seller feels, caused entirely by a fee the deal cannot carry. On the extra-large house the identical $10,000 is 3.8% of the buyer's max and the offer is $250,000 — you may have left real money unclaimed on a deal whose spread could have carried more, though leaving some is never the sin that greed is. One flat number managed to be too big at the bottom of the ladder and arguably too small at the top. That is not a standard. That is a rounding error with a slogan.

Trap two: the percentage fee

The percentage habit feels smarter because it scales — until you ask what it scales with. Set the fee at 10% of ARV and run it. Small house: fee $12,000, offer $57,000 — that fee is 17.4% of the buyer's max. Mid-size: fee $20,000, offer $90,000 — 18.2% of the buyer's max. Extra-large: fee $50,000, offer $210,000 — 19.2% of the buyer's max. The percentage stayed politely constant against the one number that does not pay your fee, and quietly ballooned against the number that does. ARV is the buyer's future sale price, gross, before their repairs, holding costs, and selling costs come out. Your fee is paid in the present, out of today's spread. Sizing a present-tense fee off a future-tense gross number is how contracts get signed at prices no buyer will close.

If you want a percentage at all, take it off the buyer's max — and even then, treat it as a sanity check, not a rule. On the ladder above, workable fees landed between roughly 7% and 9% of the buyer's max. That is a description of four examples, not a law of nature: a deal with a motivated seller and a genuinely wide spread can carry more, and a thin deal cannot carry even that. The moment a percentage starts making the decision instead of checking it, you are back in the hype.

When the fee should shrink on purpose

There is one more cost that eats fees, and it arrives wearing a costume: the double close. If your contract or your state requires one, the second closing is not free, and the calculator has a field for exactly that. Take the mid-size example and add $6,000 of extra costs: at the same $10,000 fee, your offer falls from $100,000 to $94,000. Hold the seller at $100,000 and the fee is what gives — it drops to $4,000, because $110,000 minus $6,000 of costs minus a $100,000 seller price leaves exactly that. Nobody at the closing table negotiates this with you. The arithmetic just presents the bill.

Cutting a fee on purpose is also, sometimes, simply how a deal gets done. A seller who needs $100,000 and a buyer whose max is $110,000 leave $10,000 of total room; if your costs and your minimum for the work fit inside it, a smaller fee that closes beats a standard fee on a deal that dies. What you never do is protect the fee by pushing the seller's price or the assignment price outside the chain — above the seller's floor math or above the buyer's max. A fee defended by breaking the math is not defended. The deal just fails later, louder, with your name on it.

How to talk about your fee at each size

Size changes the conversation less than you would expect, because both parties check the same thing. Your buyer does not ask what your fee is as a percentage of anything — they recompute their max from their own comps and repair numbers, and if your assignment price fits inside it, the fee is invisible; if it does not, no story fixes it. Your seller cares about one number: theirs, the contract price, which the fee never reduces after the fact because the fee was already subtracted before the offer was made. Say exactly that when a seller asks — you work with investor partners, the end buyer pays for the deal being found and assembled, and the price on their contract is the price they get, with every dollar shown on the settlement statement at closing.

What scales with deal size is scrutiny, not percentages. On a $5,000 fee on a small house, a buyer glances. On a $20,000 fee, a buyer re-runs your comps, re-prices your repairs, and asks harder questions about timeline and title — correctly, because their dollars at risk grew too. A big fee on a big deal is defensible in exactly one way: with paperwork. Verified comps, an honest repair scope, clean title information, and a contract priced inside the buyer's max. Bring those, and the fee is a line item. Skip them, and the fee is the story.

Build your own ladder before your next offer

Do this once, on paper, before your next seller appointment. Take three price levels you actually work — not aspirational ones — and for each, pick a realistic ARV and a realistic repair range from deals you have really seen. Run each through the Wholesaling Calculator at your real buyers' factor. Write down the buyer's max, then the fee that leaves the seller an offer they could plausibly accept, then that fee as a percentage of the buyer's max. You now own something no guru post can give you: your ladder, in your market, at your buyers' numbers.

Then use it the way it is meant to be used — as a first screen, not a final answer. When a new lead comes in, place it on the ladder. If its spread cannot carry the fee that makes the work worth doing, you find out in two minutes, before the drive, before the appointment, before the contract. If it can, you walk in already knowing which number is yours, which number is the seller's, and exactly how much room sits between them. That is the whole difference between the math and the hype: the hype tells you what your fee should be. The math tells you what this house, on this day, can pay — and knowing the difference is most of the job.