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Exemption certificates: file once, never chase again

Tax-exempt operators shouldn't mean tax-time archaeology. How a certificate vault applies the exemption automatically and keeps the paper trail an auditor wants.

A dispatcher at Bluewake Jet Group emails you a tax exemption certificate in March. It gets forwarded twice, saved to someone's desktop, and forgotten. By June your bookkeeper is deciding, invoice by invoice, whether to charge tax on Bluewake's orders. From memory.

Two years later an auditor asks why 41 invoices totaling $18,905 went out tax free. Now you are digging through an old inbox for a PDF that may no longer exist. We see this pattern often, and it is avoidable.

What the certificate is

An exemption certificate is a document the buyer gives you that says: do not charge tax on this sale, and here is the legal basis. In business aviation you will typically see resale certificates and state forms tied to aircraft or flight operations. The specifics vary by state and change over time, so treat any example here as a pattern and check the current rules where you sell.

The operator hands it to you once, usually when the account opens or with the first order. From then on, the burden of proof is yours. If you did not charge tax, you need to show why, on paper, for that customer, for that period.

The failure mode

Without a system, the certificate becomes tribal knowledge. Here is how the slide usually goes:

  • The certificate lives in one person's email and nowhere else.
  • Every invoice becomes a manual judgment call: exempt or not.
  • Some orders get taxed anyway, and the operator disputes them.
  • Others go out tax free with nothing attached as proof.
  • An auditor asks for support on sales from two years ago.
An exemption you cannot document is not an exemption. It is a discount you gave and a liability you kept.

File once, apply forever

The vault model is simple. The certificate is filed once, against the customer, not against an order. When Bluewake's charter coordinator uploads it, every future order from that account applies the exemption automatically at invoicing. Order 60 is treated exactly like order 1, whether the delivery goes to TEB or HPN.

Just as important, the paper trail stays attached. Each tax free invoice carries a reference to the exact certificate that justified it. When the auditor asks about an invoice for $1,284.50 from two Augusts ago, the answer is one click, not an afternoon of archaeology.

When a certificate expires

Certificates are not forever. When one comes up for renewal, check four things:

  1. The expiration date. Ask for the renewal 30 days early.
  2. The legal entity name matches the name on your invoices.
  3. The jurisdictions it covers match where you actually deliver.
  4. If it lapses, charge tax until the new one is on file. No exceptions.

Hold that line and audits become boring, which is the goal. This is the model behind the certificate vault in PlaneCater: the operator files once, every order applies it, and every invoice keeps its proof. Set it up before the auditor writes, not after.

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