Run Meta, Google and TikTok on a separate card for each client, with a limit that matches the media plan. Kestrel flags a card at 80% of budget, so overspend is fixed the same afternoon instead of found on the invoice.
Halden & Co figures from their customer story; the rest from a survey of 214 customer workspaces, July 2026.
Every ad account bills its own card, so a client’s Meta spend never mixes with another client’s Google spend.
When a campaign is pacing well, the media buyer asks for more budget in Slack and the account lead approves it in one tap.
Platform invoices match the card charges automatically, so the client report and the ledger show the same number.