Expert Startup Bookkeepers · Headquartered in the US Since 2005
Mercury Bookkeeping Services & Startup Cash Reconciliation
Last Updated: October 19, 2026Mercury is built for startups, and startup books get read by people who ask hard questions — investors, acquirers, auditors. Mercury makes several things easy that are easy to get wrong in the accounts: multiple sub-accounts, treasury balances earning yield, a corporate card settled from the same place, and partner credits that reduce costs rather than creating income. Each needs deliberate treatment, and diligence notices when it is missing.
Sub-Accounts, Treasury and the Balance Sheet
Mercury makes it trivial to create multiple accounts and to move money into a treasury product. Both are good practice and both have to be represented properly.
Each account is an account. A business running operating, payroll, tax reserve and savings sub-accounts should have each of them in the ledger, reconciling individually. Collapsing them into one makes transfers look like transactions and makes the reconciliation impossible to follow.
Treasury is not cash in the ordinary sense. Funds in a treasury or money-market product are an asset, but they are a different asset from a current account, and the distinction matters to anyone assessing liquidity. Yield earned is interest income, in other income — not operating revenue. For a startup holding meaningful cash this can be a material figure, and putting it in revenue flatters operating performance in a way an investor will spot immediately.
Movements between accounts are transfers. Obvious, and the single most common thing to find recorded as income or expense in a multi-account setup.
Where Mercury Books Go Wrong
Transfers recorded as transactions. Inflates both revenue and expenses, sometimes substantially, in a business moving money between four sub-accounts.
Yield in revenue. Flatters operating performance and gets queried in diligence.
The card treated as a bank account. A Mercury IO card balance is a liability settled from the account; coding the settlement as an expense loses every underlying transaction.
Partner and cloud credits treated as income. Startup programme credits for cloud, software and services reduce the related expense as used. Recording the gross cost and the credit as income overstates both, and overstates burn.
Investor funds as revenue. It happens. A SAFE, note or equity investment is financing, not income, and it belongs on the balance sheet.
Burn calculated from cash movement. Burn is an operating measure; cash movement includes financing, transfers and treasury activity.
Core Mercury Bookkeeping Functions We Manage
Every account reconciled individually. Operating, payroll, reserve, savings and treasury, each tied monthly, with transfers identified as transfers.
Card reconciliation. The card as a liability, transactions coded individually, settlement as a transfer.
Interest and yield separated. In other income, so operating revenue means what customers paid you.
Credits applied against cost. Cloud and software credits reducing the related expense as consumed, so burn is honest.
Financing recorded properly. Investment, notes and SAFEs on the balance sheet, with the detail an acquirer will ask for.
Diligence-ready monthly history. Consistent months that do not change retrospectively — which is what an outside reader actually assesses.
Why Outsource Your Mercury Bookkeeping to Maxim Liberty?
You get a dedicated bookkeeper who learns your Mercury setup once and keeps it right every month — not a rotating queue. Plans start at $75/month for 5 hours, with additional hours at $15/hour; CPA firms and accounting practices get our wholesale rate of $10/hour. Every engagement is backed by a 100% money-back guarantee on your 1st retainer, refundable on the unused balance, so you can test us with little to no risk.
We are a bookkeeping company, not a CPA firm, and we say so plainly. We are US-registered with delivery centers in India, which we disclose on our About page — founded in Vienna, Virginia in 2005 and headquartered in San Juan, Puerto Rico today. Your books come back tax-ready for whoever prepares your return, and we work alongside your CPA rather than claiming to replace them.
Frequently Asked Questions About Mercury Bookkeeping
Should each Mercury sub-account be set up separately?
Yes. Each account should reconcile individually, with movements between them recorded as transfers. Collapsing several sub-accounts into one makes internal transfers look like revenue and expenses — which in a business moving money between operating, payroll and reserve accounts can inflate both significantly.
Where does Mercury treasury yield go?
Interest income, in other income — not operating revenue. For a startup holding meaningful cash the amount can be material, and including it in revenue flatters operating performance in a way an investor or acquirer will notice immediately in diligence.
How should startup cloud and software credits be recorded?
As a reduction of the related expense as they are consumed, not as income. Recording the gross cost and the credit as revenue overstates both and overstates burn. This comes up constantly with cloud programme credits and it is one of the first things we check.
Is investor money revenue?
No. Equity investment, convertible notes and SAFEs are financing and belong on the balance sheet, not in income. It sounds obvious and we do find it recorded as revenue — usually in books kept by someone working only from the bank feed, where a large deposit looks like a very good month.
What do investors and acquirers actually look at?
Monthly history, consistently prepared, that does not change retrospectively. They compare months, ask why one moved, and expect operational answers rather than accounting ones. Rebuilding two years of history under transaction time pressure is the most expensive bookkeeping work we are asked to do; keeping it right monthly costs a fraction.
Related Bookkeeping Services
Books That Survive Diligence
Dedicated bookkeepers who reconcile every Mercury account, keep yield out of revenue and credits against cost. From $75/month, with a 100% money-back guarantee on your 1st retainer, refundable on the unused balance.