About Accountant Log

What this is

Accountant Log is an independent, advertising-supported site built around a set of free finance calculators, a handful of guides, and a small museum of money history. It is not a bank, an accounting firm, or a government agency, and it is not affiliated with the IRS, the SEC, or any accounting standard-setting body.

The tools

For loans and investing, there is a Loan Calculator, a Retirement Calculator, and an ROI Calculator. For running a business, there is a Break-Even Calculator, a Depreciation Calculator, an Invoice Generator, a Cash Flow Calculator, and a Business Expense Tracker. For everyday money, there is a Budget Planner, a Financial Health Scorecard, an Emergency Fund Calculator, and a Tax Withholding Calculator.

How they work

Each calculator runs the numbers you type in through a standard, named method rather than a hidden formula: amortization math for the loan payment, straight-line or declining-balance schedules for depreciation, a CAGR calculation for annualized ROI, and the 50/30/20 split for the budget planner. There is no account, no saved history, and nothing sent anywhere — the math runs in your browser on the figures you provide.

Where the numbers come from

The tools do not pull live interest rates, tax tables, or market data. You supply the inputs — principal, rate, term, income, expenses — and the calculator applies the formula. The Tax Withholding Calculator is explicitly a rough, simplified federal-style estimate, not a substitute for payroll software or a real tax table.

The museum

The Money & Finance Museum is a separate, browsable timeline covering currencies and coins, markets and exchanges, the history of accounting and bookkeeping, and the economists behind it all. Every entry, image, and fact is sourced from Wikipedia and Wikimedia Commons, not written by us.

Who this is for

Freelancers sizing up an invoice or a business expense, small-business owners checking a break-even point or a depreciation schedule, and anyone budgeting, saving for retirement, or comparing a loan. If you want a quick, honest estimate before a bigger decision, that is what these tools are built for — not a substitute for the paperwork itself, just a faster way to see where the numbers land before you commit to anything.

Straight talk about ads & advice

This site is funded by display advertising, which is how it stays free with no sign-up. Every calculator produces an estimate based on the figures you enter, not professional accounting, tax, or financial advice — for decisions specific to your situation, talk to a licensed CPA, tax professional, or financial advisor. There are no founders’ stories, staff bios, or user counts here worth inventing; it is one site, its tools, and its museum.

Questions, corrections, or a tool idea? Get in touch.