Up until now, accounting software has kept founders looking backward. Outdated systems that leave them reacting to outdated numbers. Yet another tool to log into, system to sync, data to translate across platforms. For bookkeepers and accountants, it’s meant spending hours on manually data entry instead of actually advising their clients.
Mercury Books ends that. It’s the first intelligent accounting software built directly into the place your money already lives — your banking platform.
All your transactions across banking, invoicing, bill pay, and more are pulled in automatically as you build your business. Intelligence automatically categorizes and reconciles these entries in real time, erasing manual work before it lands on your to-do list.
Not only are there no integration headaches, but with books and banking together, the issues that traditionally slow down bookkeeping largely take care of themselves. Your books are closed faster and more accurately, and the delta between doing and understanding is, too. You get one clear, complete story of your business, written in real time.
Your P&L, balance sheet, and cash flow statement are ready the moment you need them, not stitched together the week before a board meeting or a fundraise. Because every report pulls from the same real-time transaction data as the rest of Books, what you're looking at reflects today, not last quarter.
We built Books from scratch with the conviction that bookkeeping should simply happen, accurately and automatically, in the background, so founders and bookkeepers can focus on the business instead of the busywork. Categorization runs constantly behind the scenes, only surfacing the transactions that actually need a second look. Reconciliation is continuous and real time, ensuring nothing is ever missed.
Ask Mercury Command a question about your books, or hand off a bookkeeping task to it directly, in plain language. Soon, a full accounting API will make every core Books action available programmatically, and an MCP layer will let AI agents handle bookkeeping tasks end-to-end.
A tool your accountant will trust
Mercury Books is a full double-entry accounting engine, supporting accrual or cash basis, built and tested alongside working accountants and bookkeepers. Ridgewood, a cross-border accounting firm serving 200+ monthly clients, was one of our first beta partners: their team cut time spent on manual bookkeeping tasks in half, freeing them up for the advisory work their clients actually want. "Mercury Books has given us more time to be that sounding board," says founder Chris P. [Read Ridgewood's story →]
Invite your bookkeeper in-product, with unlimited seats at no extra cost. They get the same real-time view you do, with full context on every transaction already attached. Don't have a bookkeeper? We can match you with a recommended partner.
Mercury started as a better way for founders to bank, and we've since been building toward a future where your entire financial life lives in one place. Books is the natural next step in that story: if your banking already lives in Mercury, your books should too.
Mercury Books is free for all Mercury customers through the end of 2026, then $35/month. Not yet a Mercury customer? Apply for an account to get started. Head to the Books tab in your dashboard to set up your first books, or learn more at mercury.com/books.
