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Bookkeeping, close & software6 min readPublished July 2024Updated September 2026

Outsourced accounting services: what you get, and when they fit

Nare KhachatryanHead of Marketing, Hundred MS. Reviewed by Narek Abgaryan, CFA, FRM.
Illustration of a teal briefcase open like a small office, showing outsourced accounting services as a desk with a ledger, a calculator and a yellow clock
The short answer

Outsourced accounting services mean an outside team keeps your books, closes them every month and produces the reports, working inside your own accounting system. You get a full finance function without hiring one: bookkeeping, reconciliations, a month-end close, management reports and someone to answer questions. It fits companies that have outgrown a part-time bookkeeper but do not need a full-time controller yet. The two things to check before you sign are what you receive each month and who signs the numbers.

Key takeaways
  • Outsourced accounting is bookkeeping plus the close, the reconciliations, the reports and a reviewer, done inside your own system.
  • Judge a provider by what arrives each month and by who signs the numbers, not by the sales meeting.
  • Keep the data and the working files in your own accounts, so you can see everything and leave with everything.

What outsourced accounting services are

You hand the day-to-day accounting to an outside firm. They post transactions, reconcile the bank, close the month, prepare the reports and keep the records ready for your tax preparer, your lender or an audit. The good ones do it inside your own accounting system, so the data stays yours and you can see it any day.

It is not the same as hiring a bookkeeper by the hour, and it is not the same as a fractional CFO. The table shows where each one stops.

OptionWhat they doWhat they usually do not do
Part-time or virtual bookkeeperPosts transactions, matches the bank feed, sends invoicesAccruals, revenue timing, a reviewed close, management reports
Outsourced accounting servicesAll of the above, plus reconciliations, a month-end close, reports and answers to questions, with a second person reviewingStrategy, fundraising, board work
Fractional CFOCash forecasting, budgets, business plans, investor and lender conversationsThe bookkeeping itself
In-house finance teamEverything, on your payrollCover for holidays and departures; specialist skills you use twice a year

Many companies use the middle two together: the accounting service keeps the numbers right, and a fractional CFO uses them. That is how we work with most of our own clients.

What you should receive every month

The service is only as good as what lands in your inbox. Before you sign, ask for the list. Ours looks like this.

  • Reconciled accounts. Every bank, card, processor, loan and payroll balance tied to a statement from outside the system.
  • A closed month by a fixed day. Books closed by business day 10, guaranteed from your third month. Here is the schedule.
  • Management reports with words. Profit and loss, balance sheet and cash, plus a short note on what changed and why.
  • Answers. A named accountant who replies within one business day, with the evidence, when you ask why a number moved.
  • A clean handover file for tax time. Reconciliations, adjustments with reasons, and the documents behind every entry.
A question to ask yourself first

If your lender asked for last month's balance sheet and a reconciliation of the bank balance today, how many days would you need? If the answer is more than two, the books need a process, whoever runs it.

The honest pros and cons

Outsourcing has real advantages and real risks. Anyone who lists only the first is selling.

In favorAgainst, and how to handle it
You get a whole team, including a reviewer, for less than one senior hireThe team is not down the hall. Agree who answers, and how fast, in writing
Cover for holidays, illness and departures is built inYour knowledge of your own numbers can fade. Keep reading the monthly reports
Specialist skills when you need them: NetSuite, sales tax, revenue rulesConfidential data leaves your building. Give access through your own systems and permissions, never by sharing passwords
The process is written down, so it does not live in one person's headSwitching later takes effort. Insist that the data and the working files stay in your accounts, so you can leave with everything

When it fits, and when it does not

It fits when the books take a founder more than a few hours a month, when a part-time bookkeeper is out of their depth on accruals, revenue or several entities, when an investor or lender wants monthly numbers you can stand behind, or when a controller has left and the close has stopped. Most of our clients arrived at one of those points. Of the 43 companies we have served, 26 are still with us.

It does not fit when the real problem is strategy rather than bookkeeping, when someone in-house is already doing the job well, or when the books are so far behind that they need a cleanup project first. A monthly service cannot start on numbers that do not tie. We say so, and we quote the cleanup as a separate job with its own end date.

How pricing usually works

Most firms, including us, charge a fixed monthly fee based on the volume of transactions, the number of accounts and entities, and what is included. Hourly is for odd jobs. Ask for a written scope with the fee, and for the price of things outside it. We send a written scope and quote within two days of a first call.

Where AI comes in

In our practice AI does the repetitive part: matching bank lines to bills, importing, drafting recurring entries, flagging a balance that moved more than usual. That is why a small team can close many sets of books in ten business days. It never posts by itself. A senior accountant checks the exceptions and signs the close, the AI never sees passwords and never moves money, and every mistake it makes becomes a written rule. If a provider tells you their accounting is fully automated, ask who signs the numbers.

Five questions before you sign

  1. Which system will the books live in, and will it be my account?
  2. What exactly arrives each month, and by which day?
  3. Who reviews the work of the person who does it?
  4. Who do I call when a number looks wrong, and how fast do they answer?
  5. If I leave, what do I take with me, and how long does the handover take?

Where this goes wrong

The problemWhat it costs youThe fix
The books live in the provider's systemLeaving means starting again, and you cannot see your own numbers on demandInsist on your own accounting account, with the provider as a user
The scope says "bookkeeping" and nobody defined the closeReports arrive late or not at all, and tax time is a scrambleWrite the monthly deliverables and the closing day into the agreement
Access is given by sharing passwordsNo trail of who did what, and no way to revoke one personOne named user per person, with the permissions the job needs
How we know

Based on our own client work. This is the service we run for most of our clients, the questions are the ones we are asked on discovery calls, and the numbers are the ones we publish about ourselves.

First published 2024. Rewritten and checked in September 2026. If something here is out of date, tell us and we will fix it.

Want a second pair of eyes on this?

Bring the question to a free 30-minute call. You talk to the founder, and we tell you honestly whether we can help.

Hundred brought significant accuracy and stability to our internal accounting processes, and I trust them very much.
Aaron Mirsky, PhDAaron Mirsky, PhDCFO, ONE Insurance Services

Outsourced accounting services: common questions.

1What is the difference between outsourced bookkeeping and outsourced accounting?

Bookkeeping is recording: posting transactions, matching the bank feed, sending invoices. Accounting adds the judgment and the close: accruals, revenue timing, reconciliations to outside evidence, reviewed reports, and answers to questions. Most growing companies need the second; the first alone leaves the month-end unfinished.

2Is a virtual accountant the same as outsourced accounting services?

A virtual accountant is usually one person working remotely, often by the hour. Outsourced accounting services come from a firm with a team, a written process and a reviewer, so the work continues when one person is away, and someone checks it. The right choice depends on how much depends on the numbers being right.

3Is it safe to give an outside firm access to my financial data?

It is, if the access runs through your own systems. Give the firm its own user in your accounting software and bank portal with the permissions it needs, never a shared password. Ask how they handle AI tools: ours never see passwords and never move money. Then everything is visible, revocable and in your name.

4How much do outsourced accounting services cost?

Most firms charge a fixed monthly fee that depends on transaction volume, the number of accounts and entities, and what is included, and we do not publish a price list because those differ so much between companies. What we do promise is a written scope and quote within two days of the first call, so you can compare it with a hire or with another firm on the same page.

Bring us one number you don’t trust.

A 30-minute discovery call. No slides, no pitch. We look at one real problem in your books and tell you honestly whether we can fix it, and what it would cost.

  1. 1
    Pick a slotOne question on the form: your accounting system. Add a note about the number if you like.
  2. 2
    30 minutes with the founderWe look at the problem live, in your numbers.
  3. 3
    A written scope and quote within 2 daysTake it or leave it. Either way you understand your problem better.
Narek Abgaryan
You’ll talk to Narek AbgaryanCo-Founder & CEO · CFA, FRM

If we don’t think we can help, we say so on the call and point you somewhere better. We only take on work we can tie to the penny.

Not ready for a call? Email me the number instead.

narek.abgaryan@hundredms.com 727 625 4373 Hundred MS LLC · 7901 4th Street North, Ste 300, St. Petersburg, FL 33702 · we reply within one business day.
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