Nearly every property-care agreement contains a clause allowing the provider to bill third-party costs onward at cost plus a percentage. Materials, laboratory fees, a specialist's invoice. It is a fair mechanism. It compensates the provider for sourcing, financing and warranting work they did not perform themselves.
It is also the single most disputed line on property-management invoices, and the reason is almost never the percentage.
The dispute is about visibility, not rate
Owners rarely object to a stated markup. They object to a line that reads "materials, one hundred and eighty dollars" with nothing behind it. The percentage may be perfectly correct, but the client cannot verify the base number, so they cannot verify anything.
Suspicion follows, usually unfairly. And because the provider's own records are often a folder of photographed receipts unconnected to any invoice line, answering the challenge takes an afternoon of searching. Some providers stop billing small materials entirely to avoid the conversation, which simply moves the loss onto themselves.
Three things that must live on the line
A pass-through charge is defensible when the invoice line itself carries the underlying cost, the markup percentage applied, and a link to the receipt. Not in a folder. On the line.
MapleConcierge stores these as separate fields on the service report item. The third-party cost before markup, the markup percentage, and the resulting price sent to the invoice are three distinct values, alongside the uploaded receipt image and, where relevant, the vendor.
That structure makes the arithmetic reproducible by anyone looking at it, including the client, a year later.
Why the percentage is snapshotted
There is a subtler failure that catches growing firms. A provider renegotiates their standard markup at renewal. Some months later, someone reprints last season's report for a query, and the system helpfully recalculates every historical line at the new percentage.
The reprint now disagrees with the invoice the client actually paid. The provider looks either careless or dishonest, and untangling it requires reconstructing what the rate used to be.
MapleConcierge writes the markup percentage onto the line at the moment of billing. A reprint of a two-year-old report shows what was charged, not what would be charged today. History is a record, not a live calculation.
Refusing to guess
A related decision worth stating plainly. If no markup is configured for an agreement, MapleConcierge refuses to bill the pass-through item at all rather than defaulting to zero.
Zero markup and unconfigured markup are different business facts, and treating the second as the first produces silent revenue loss that nobody audits. A laboratory fee billed at bare cost because a rate was missing looks like a correct invoice. It is a leak, and it repeats every year until someone happens to notice.
An error at the moment of billing is loud, immediate, and fixable in a minute.
What owners should ask for
Ask that every pass-through line on your invoice show the base cost, the markup, and a viewable receipt. A provider whose system supports it will agree without hesitation, because it protects them as much as you.
A provider who resists is telling you something about their records, not about their honesty.