Coffee Cart and Mobile Espresso Invoicing App (2026)
A coffee cart is booked months out, quoted per guest or per service hour, and paid by a corporate office that needs a real invoice. ShowTheReceipts ($15/mo) saves your per-guest and per-hour packages, takes a deposit that holds the date, and sends a proper itemized invoice with net terms when the payer is an accounts-payable department rather than a bride.
How we picked
Entry-plan prices as published in 2026, taken from each vendor's own pricing page or a recent third-party summary. Judged on the mobile coffee operator's real workflow — per-guest package quoting, date-holding deposits, travel and power surcharges, and corporate invoicing with net terms — not on café POS, retail inventory, or loyalty programs.
| Software | Starting price | Best for |
|---|---|---|
| ShowTheReceipts That's us | $15/mo | Coffee cart operators: package quoting, date-holding deposits, corporate net-terms invoicing |
| Square | Free + 2.6% + 10¢ | Taking card payments at the cart itself |
| Invoice2go | $9.99/mo+ | Basic mobile invoicing |
| HoneyBook | $29/mo+ | Proposal-and-contract flows for event businesses |
| Flashquotes | $49/mo+ | Mobile event businesses wanting a self-serve quote form |
Two customers, two billing styles
A coffee cart sells to weddings and to offices, and they pay in completely different ways:
- Private events — deposit at booking, balance before the date, paid by a person
- Corporate — itemized invoice, PO number, net 30, paid by a department
Trying to run both on one flow is why cart operators end up chasing money for months.
1. ShowTheReceipts — $15/mo
Saved per-guest packages, deposits that hold the date, travel and power lines, and net-terms invoices with PO fields for corporate work.
2. Square — free + processing
Excellent at the cart for retail-style events; not an event booking or invoicing workflow.
3. Invoice2go — $9.99/mo+
Basic mobile invoicing, no deposit or booking side.
4. HoneyBook — $29/mo+
Proposals and contracts for event businesses, priced for that full workflow.
5. Flashquotes — $49/mo+
Self-serve quote forms aimed at mobile event operators.
The lines that make a cart profitable
- Service window — two hours, with an overtime rate per half hour
- Guest count — priced per head, with a minimum
- Specialty drinks — matcha, syrups, alternative milks
- Travel — mileage or a zone fee past your radius
- Power — generator line when the venue can’t supply it
- Branding — custom cups or a logo sleeve, quoted separately
The overtime rate is the one to write down
Events always run long, and “just keep going another half hour” might be the most expensive sentence in mobile catering. A stated overtime rate on the quote turns that request into revenue instead of a favor.
Frequently asked questions
How should a coffee cart be priced?
Per guest with a service-hour minimum, or a flat package for a set headcount and window — plus travel, power, and any specialty drink upcharge. Pricing per drink sounds fair and quietly ruins you at a corporate event where nobody stops ordering.
How much deposit holds a date?
25–50%, non-refundable inside a stated window. Wedding and corporate dates get shopped for months, and a cart that holds Saturdays on a verbal yes is a cart that sits idle on a third of them.
How do I invoice a corporate client?
With a real itemized invoice, a PO number field if they use one, and net terms rather than an on-the-day card swipe. Corporate AP departments can't pay a text message, and the ones that want to pay you are held up by an invoice that doesn't look like one.
Should travel and power be separate lines?
Yes. A venue with no accessible outlet means a generator; a venue an hour out means an extra half-day. Both are real costs that vanish if you quote one round number for the event.