Bookkeepers price their work in two basic ways. Some bill for their time, and the invoice at the end of the month reflects however many hours the work took. Others quote a fixed monthly fee for a defined scope, and the invoice is the same every month whether the work took four hours or nine. There are variants of each, but almost every proposal you receive will be one or the other at its core, and the choice affects more than the total you pay. It changes what you will be told, what you will be charged for asking, and what happens when your business has an unusual month.
This page explains how each model works, where each one genuinely fits, and what to read carefully before signing either kind of agreement. It is written for the owner comparing proposals, not for the bookkeeper writing them.
How the two models actually work
Hourly billing is simple to describe: the bookkeeper tracks time, applies a rate, and bills the total, usually monthly. The rate may differ by task or by who performs it. What the model really means is that you are buying effort rather than a result. If your bank feed breaks, your processor changes its deposit format, or you send receipts in a shoebox, the extra hours are yours to pay for. The upside is that a quiet month costs less, and a one-time project with no clear end is easy to start because nobody has to define it first.
Flat-rate pricing quotes a fixed monthly fee for a defined scope: a set of accounts to reconcile, transactions to categorize, and reports to deliver on a schedule. The fee usually depends on the size of the business, measured by transaction volume, number of accounts, number of entities, or revenue, and it may step up through tiers as the business grows. What you are buying is a result and a deadline. The bookkeeper absorbs the variation in effort from month to month, which is why the scope has to be written down: the fee only works for both sides when everyone agrees what is inside it.
Two hybrids are common. Some firms quote a flat monthly fee and bill hourly for anything outside the scope, such as cleanup, a special report, or a software migration. Others quote per transaction or per account, which behaves like a flat fee that scales with your activity. Both are reasonable as long as the triggers are explicit. The model to be wary of is a flat fee with a vague scope, because that is an hourly engagement wearing a different label.
Where hourly fits, and where it bites
Hourly makes sense for genuinely undefined work. A forensic review of several years of tangled records, a software conversion with unknown data quality, or a few hours of training for an in-house person are all hard to scope in advance, and paying for time is fairer to both parties than guessing. Very small or seasonal businesses with a handful of transactions a month can also do well on hourly, because a fixed fee designed for a typical client may be more service than they need.
The problems with hourly show up in ongoing work. The bill is unpredictable, which makes it hard to budget and tempting to defer. Every question costs money, so owners stop asking them, and the bookkeeper becomes someone you avoid rather than someone you use. The incentives are also quietly misaligned: the bookkeeper is paid more when the work is slower, and nobody is paid to make your bookkeeping take less time. None of this means hourly bookkeepers are dishonest. It means the structure rewards effort rather than outcome, and over months and years that shapes the relationship.
Catch-up work is where hourly hurts most. If your books are eighteen months behind and the bookkeeper bills by the hour, you will not know what the cleanup costs until it is finished, and the estimate you were given has no force. Ask any hourly proposal for a cap or a not-to-exceed figure on cleanup. If the firm will not give one, that tells you something about how confident they are in the estimate.
Where flat-rate fits, and what to check in the scope
Flat-rate suits any business that wants bookkeeping to be a predictable operating expense: the same fee each month, reports on a known date, and the freedom to ask questions without watching a meter. It also suits businesses that are growing, because a fixed deadline for the close is what makes the reports useful for decisions. A profit and loss statement that arrives whenever the hours happen to be finished is a historical document. One that arrives on a fixed day early in the month is a management tool.
Read the scope line by line before signing. Confirm which accounts are included and whether adding a credit card or a second bank account changes the fee. Confirm whether the fee covers reconciliation of payment processors and loan accounts, not just the main checking account. Check what is explicitly excluded: payroll processing, sales tax filings, accounts payable bill paying, invoicing, and the income tax return are commonly separate, and that is fine as long as you know it. Check what triggers a tier change and how much notice you get. Finally, check the exit terms. A flat fee with a twelve-month contract and a cancellation penalty is a very different product from a month-to-month arrangement at the same price.
Ask how cleanup is priced when you start. Most businesses switching bookkeepers or starting fresh have at least a few months that need to be brought current, and a flat monthly fee rarely includes it. The fair arrangement is a separate one-time cleanup fee, quoted before any work begins, with a committed timeline. An open-ended cleanup billed by the hour inside an otherwise flat-rate engagement is the most common way owners end up paying far more than the monthly fee suggested.
Deciding, and how Evolv prices it
If you need a one-off project with an unknowable scope, hourly with a cap is a reasonable choice. For ongoing monthly bookkeeping, a flat fee with a written scope, a committed delivery date, and no long-term contract is the structure that serves most small businesses best, because it makes the cost predictable and the deadline real.
That is how EVO Bookkeeping prices its work. Ongoing bookkeeping is $199/month flat, with your bank, card, and processor accounts reconciled, transactions categorized, and your income statement and Balance Sheet delivered by day 2 of the following month, plus 1099 prep at year end. Catch-up is a one-time fee of $199 for each month behind, scoped and agreed before any work starts, completed within 2 days and guaranteed in writing. There are no contracts and you can cancel anytime. You can get an instant quote on our homepage.