Found a 15% parts markup buried in a management agreement, capped it at 5

So the manager owns the supply company and sells to the property they manage. Is that normal or is it a red flag? I genuinely can't tell from your post whether you think the sponsor was being sharp with you or just using a standard form.

Normal, and defensible up to a point. On the management side, buying through a central purchasing entity is how you get pricing that a single 96-unit property can't get on its own, and administering it costs real money. The markup is supposed to pay for the warehouse, the staff, and the freight. Fifteen is high. Five with a quote requirement over $2,500 is roughly where I've seen it land when someone pushes.

The test isn't whether the affiliate exists, @beacon. It's whether the delivered price to the property beats what the site could get from a local supply house. Ask for a price comparison on ten common items, toilet flappers and range elements and blind sets. If the affiliate is cheaper delivered even at 15%, the clause is doing what it says. If it isn't, the markup is a fee dressed as procurement.

Affiliate purchasing clauses show up in most third-party management agreements and in nearly all sponsor-affiliate arrangements, where the manager and the general partner share ownership. The mechanism is straightforward. The manager buys at volume, sells to the property at cost plus a stated percentage, and the property's expense line carries it. Because the charge sits inside operating expenses, it reduces net operating income, which reduces both distributions and the valuation the property carries at a given cap rate. A $8,700 annual charge at a 5.5% cap is roughly $158,000 of value at exit, so the clause matters well beyond the cash flow.

What to look for when you read one of these: whether the markup percentage is stated or left as "reasonable," whether it applies to labor as well as materials, whether there's a separate construction management fee that can stack on capital projects, and whether the agreement gives investors any audit right over affiliate invoices. The last one is the weakest in most documents. An audit right that requires majority consent of limited partners is functionally no audit right for a small holder.

@trellis is describing the correct test. Delivered cost to the property, compared against what a site manager could buy locally, is the only measure of whether the markup is procurement or compensation. Ask for the comparison in writing on a basket of common items.

One caution on the outcome in this thread. Whether a disclosed affiliate markup creates a fiduciary problem depends on the specific agreement language, the disclosures made at subscription, and the law of the governing state, which differs. That question belongs with a securities attorney, not a forum. The negotiating point, that undefined terms get defined when someone asks, holds regardless.