Separating business and personal money: the first real step
Commingled accounts cost you deductions, inflate your accounting bill, weaken liability protection and make the business impossible to value. Fixing it takes an afternoon.
By Sankha NagChoudhurySeptember 10, 20267 min read
Nearly every messy small business I have seen shares one root cause: one bank account doing two jobs. Untangling it later costs far more than separating it at the start.
What commingling actually costs
Mixed accounts make every deduction an argument, every month-end a reconstruction, and every valuation a guess. If you operate through a company, they also undermine the separation that the structure is supposed to give you.
Deductions become hard to evidence when personal and business spending share a statement.
Bookkeeping time — and therefore your accounting bill — rises with every mixed transaction.
For an LLC or corporation, commingling is a common argument for disregarding the entity's protection.
A buyer or lender cannot read your real profit out of a personal account.
The setup, in one afternoon
You need a business checking account, a business savings account for tax, a card used only for business, and a bookkeeping tool connected to all three. That is the whole architecture.
Open the accounts in the business name, using the business tax ID where you have one.
Route every client payment into business checking and nothing else.
Move a fixed share of each deposit to the tax savings account automatically.
Connect the accounts to bookkeeping software and categorise weekly, not annually.
Paying yourself properly
Owners get paid deliberately, on a schedule, through the right mechanism for the entity — not by tapping the business card at the grocery store. The mechanism differs by structure, and getting it wrong has tax consequences.
Sole proprietors and most single-member LLCs take owner draws, not wages.
An S corporation owner-employee generally must take reasonable compensation through payroll.
Set a regular pay date so household cash flow stops depending on business timing.
Record every owner transfer as a draw or wage, never as a business expense.
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Educational guidance, not personal advice. Outputs are illustrative, may contain errors, and should be independently verified before material decisions.
