best outsourced bookkeeping service for small businesses

Outsourced Bookkeeping Services For Small Business

The Numbers Advisors provides dedicated outsourced bookkeeping for Tucson small businesses who want accurate monthly financials, use QuickBooks Online, and would like an experienced advisor watching their numbers every week.

What Outsourced Bookkeeping means at The Numbers Advisors

When you outsource your bookkeeping to us, you get a dedicated bookkeeper working in your QuickBooks Online file every week. We don’t wait weeks and then process your transactions once a month in a batch process. Your financials are delivered by the 10th of the month, your bank, credit card accounts, and loans are reconciled, and you have someone to call when the numbers don’t look right.

We work entirely in the cloud, which means no desk space, no equipment, and no employee-related benefits overhead on your end. You connect your accounts to QuickBooks Online, send us documents through the app, and we handle the rest.

What’s Included


Weekly bookkeeping

Transactions categorized, reconciliations current, no month-end scrambles.

Responsive communication

Questions answered quickly. No chasing. No waiting weeks for a callback.

Tax-ready year-end books

Your CPA gets clean, organized financials. No last-minute cleanup fees.

Financials by the 10th

Profit & loss, balance sheet, and cash flow delivered on a schedule you can count on.

CXO advisory layer

Every engagement includes access to executive-level advisory, former CEOs, COOs, and CFOs who’ve run small businesses.

AI-forward Tools

We use automation to reduce manual work and keep your costs predictable.

Who Outsourced Bookkeeping For:

Outsourced bookkeeping isn’t for everyone, but it’s the right move for many growing businesses that need a better understanding of their finances without the cost of a full in-house team.

This service is a strong fit if you are:

  • A small business owner who needs accurate, up-to-date books without managing an internal bookkeeper
  • A founder or startup operator who wants clean financials to support growth, getting a loan, or decision-making
  • A service-based business with inconsistent or time-consuming bookkeeping needs
  • An owner replacing an in-house bookkeeper who is too expensive, inconsistent, or difficult to manage
  • A business scaling past DIY accounting and needing more reliable financial processes

If you’re spending too much time on your books, or don’t trust the numbers you’re seeing, outsourced bookkeeping can give you understanding and control without adding internal overhead.
We work with established small businesses across all industries: HVAC, medical, retail, professional services, construction, and more. If you have recurring transactions, employees or contractors, and need reliable monthly financials, we’re built for you.

Most of our Tucson clients come to us in one of three situations: they’ve outgrown doing it themselves, they’ve tried an office generalist whose QuickBooks became a mess, or they’re paying an in-house bookkeeper and want better results for less money.

How getting started works

Schedule a Free Call

We talk through your business, current bookkeeping situation, and what you need. No pressure, no pitch deck.

We Assess Your Books

We review your current QuickBooks file (or set one up if you don’t have one) and tell you exactly what we see and what we’ll do.

We get to work (often the same week)

Once we agree on scope and pricing, most clients are active within days. You’ll have your first monthly statements within the next billing cycle.

How Much Does Outsourced Bookkeeping Cost?

The cost of outsourced bookkeeping depends on the complexity of your business, but most small businesses can expect to invest between:

$300 – $2,500+ per month (our average client is on the low end of this range)

Your actual cost depends on factors like:

  • Number of monthly transactions
  • Number of accounts and integrations
  • Payroll and Inventory complexity
  • Reporting requirements
  • Catch-up or cleanup work needed

Unlike hiring an in-house bookkeeper, outsourced services scale with your business so you only pay for what you actually need.

For a deeper breakdown of pricing and what affects cost, see our guide on how much outsourced bookkeeping really costs.

Want a clear estimate?
We’ll review your current setup and give you a straightforward quote based on your needs.

Outsourced Bookkeeping vs. In-House: Which Is Right for You?

One of the most common questions we hear is whether it’s better to hire internally or outsource your bookkeeping.

Here’s the reality:

In-House Bookkeeping

  • Higher fixed cost (salary, benefits, training)
  • Dependent on one person
  • Requires management and oversight
  • Limited scalability

Outsourced Bookkeeping

  • Flexible monthly cost
  • Access to a team, not just one person
  • Established systems and processes
  • Scales with your business

For many small businesses, outsourcing provides better reliability and cost control, especially when you’re growing.

For a full breakdown of when outsourcing makes sense (and when it doesn’t), read our detailed comparison in our Outsourced vs In-House Bookkeeping blog post.

Why Choose Us Over Other Bookkeeping Firms?

Not all outsourced bookkeeping services are the same. The difference isn’t just in what gets done, it’s in how consistently, accurately, and proactively your books are managed.

Here’s what sets us apart:

1. Built for Small Business Owners

We don’t take a one-size-fits-all approach. Your bookkeeping is structured around how your business operates. We make sure your reports are useful, not just technically correct.


2. Understanding, Not Just Compliance

Many firms focus only on keeping your books “up to date.”
We focus on making your numbers understandable and actionable, so you can make better decisions. It’s the reason I started the company.


3. Consistency You Can Rely On

No missed months. No surprises. No scrambling at tax time.
You get reliable processes and predictable delivery.


4. Scalable Support

Whether you’re just getting organized or growing quickly, your bookkeeping evolves with you without needing to hire internally. If it takes extra effort, we take care of it.


5. Direct Access When You Need It

You’re not stuck in a ticket system or waiting days for answers.
When questions come up, you get clear, timely responses because you know who to ask.


If you’re comparing outsourced bookkeeping firms, the real question isn’t “what do they do?”
It’s “will this actually make my business easier to run?”

That’s where the right firm makes all the difference.

What Tucson business owners say

  • I reached out to Philip at The Numbers Advisors right before tax season with a full year’s worth of records that needed to be organized and entered. He jumped right in, cleaned everything up quickly and accurately, and had my books completely ready in time for me to file taxes without any issues. The team was professional, patient, and extremely efficient... read more

    jaron cantrell Avatar jaron cantrell
    April 15, 2026

    Philip is one of the easiest guys to talk to, and one of the smartest out there. His understanding of how business works and what the numbers mean is extensive and enviable. Do yourself a favor and have a conversation with him if you're looking for a solid bookeeper!

    Logan Harding Avatar Logan Harding
    November 29, 2025

    I met Philip a few months back wanting his opinion on business growth and getting my bookkeeping clean and up to date. Philip's knowledge and suggestions were amazing. And at the same time he was easy to talk with without feeling overwhelmed nor belittled. If you are growing or selling it, I highly suggest Philip of The Numbers Advisors... read more

    David S. Livingston Avatar David S. Livingston
    February 15, 2026
  • The Numbers Advisors took over my books in late October and have been crunching numbers ever since to get them in order for the end of year. Phillip has been doing a great job cleaning up the books and get them ready for the end of 2025. He has gone above and beyond. Looking forward to 2026. Thank you.

    Zac Palmer Avatar Zac Palmer
    January 3, 2026

    Phil has been excellent to work with. He has a fantastic grasp on business and how to scale a business. I highly recommend this firm.

    Raul Gonzalez Avatar Raul Gonzalez
    November 24, 2025

    Phil is not just one of the nicest people you'll ever meet; he genuinely cares about his clients in a way that is rare to find. He goes above and beyond to ensure that everyone he works with is taken care of, often dedicating his own time and effort without expecting anything in return. His commitment to your success is... read more

    Tylers Acid-Free Coffee Avatar Tylers Acid-Free Coffee
    December 5, 2025
  • Philip goes above and beyond to take the mystery out of our books! Excellent communication and proactive problem solving sets the Numbers Advisors apart. We are so grateful he is watching over our books now and keeping them in good working order. Thank you, thank you, thank you!

    Kristi Heins Avatar Kristi Heins
    February 18, 2026

    I've been working with The Numbers Advisors for about 5 months now and couldn't be happier. I outsourced my bookkeeping to Philip and his team cleaned everything up efficiently for year-end, and took the time to understand my business before making changes. He's incredibly knowledgeable about small business operations, communicates ideas simply, and cares about helping clients understand their numbers.... read more

    Lady Baba Avatar Lady Baba
    April 14, 2026

    Phil is amazing at bookkeeping, they are comprehensive and constantly on the ball making sure my business runs great. This is the place to go to for your books!

    Fareed Alshami Avatar Fareed Alshami
    March 25, 2026
  • I'm so glad we chose The Numbers Advisors to be our outsourced bookkeeping service. They moved us from excel spreadsheets and setup our QuickBooks. I get my financials every month and I can see where my money is going. We're saving money because we got rid of software we don't need anymore, and Philip found other money for us in... read more

    Jodie Hathaway Avatar Jodie Hathaway
    April 10, 2026

    I had a great experience with Philip. He listened, asked insightful questions, brought up angles I hadn’t considered, and clearly has deep and nuanced experience with small business in Tucson. He gave great advice and offered some wise and practical action steps. Overall, I would highly recommend The Numbers Advisors to anyone looking for clear, practical business guidance.

    Dave Lamp Avatar Dave Lamp
    February 20, 2026

Specific Service Descriptions


Frequently Asked Questions

How much does outsourced bookkeeping cost?

Pricing depends on your transaction volume, the complexity of your accounts, and the service tier you choose. We offer Essentials, Established, and Enterprise packages. Schedule a call, and we’ll give you a clear number, no hidden fees, no surprise invoices.

Do you handle payroll and taxes?

We do not calculate or file taxes, and we don’t run payroll. We integrate with payroll providers and pull that data cleanly into your QuickBooks. Your CPA handles your tax filings and we make sure they have accurate books to work from.

What if my QuickBooks is already a mess?

That’s one of the most common situations we step into. We offer a dedicated QuickBooks cleanup service to get your company file back to accurate, and we can take over ongoing bookkeeping from there.

Do I need to be in Tucson to work with you?

No. We work with clients remotely across the country. Everything runs through QuickBooks Online and cloud-based document sharing, so geography doesn’t matter.

How quickly can I get started?

We typically start new clients in the same week we speak. If you have a deadline, like an upcoming tax filing or a bank loan that requires financials, let us know on the call, and we’ll work around it.

About The Numbers Advisors

Philip Williams, Founder of The Numbers Advisors, standing and smiling

The Numbers Advisors is a Tucson-based bookkeeping and advisory firm serving small businesses across all industries. We aren’t a CPA firm and don’t provide tax or audit services. We focus entirely on accurate, well-organized books that serve you and your tax professional.

Philip is a Certified Exit Planning Advisor (CEPA) and has worked with hundreds of small business owners on bookkeeping, financial clarity, and business advisory, from early-stage companies to businesses preparing for sale.