Bookkeeping and Advisory Services for Northern Virginia Small Businesses
Monthly bookkeeping, payroll, tax preparation, and fractional CFO services for small and mid-sized businesses across Fairfax, Northern Virginia, and the greater DMV area.
Xero & QuickBooks Certified • 20+ Years Finance Experience
What Brought You Here?
These are the situations we hear about most from business owners.
Months Behind on the Books
It started as one missed month. Now it's been half a year and you're not sure where anything stands. We pick up wherever your books left off, reconcile everything, and get you current so you can move forward with clean numbers.
QuickBooks or Xero Is a Mess
You set it up yourself or someone set it up for you, and now nothing ties out. Transactions are miscategorized, accounts don't make sense, and your reports are unreliable. We clean it up and build a chart of accounts that actually works for your business.
No Clear Picture
You know money is coming in and going out, but you couldn't tell someone your actual profit margin or where your biggest expenses are. We close your books every month and deliver reports that show you exactly where your business stands.
Payroll Is Eating Your Time
Running payroll yourself means tracking hours, calculating withholdings, making deposits, and filing quarterly returns. One mistake and you're dealing with the IRS or an unhappy employee. We take over the entire process and handle it correctly every pay period.
Tax Time Is a Scramble
Every year it's the same scramble to pull records together for your CPA. When the books are disorganized, tax prep takes longer and costs more. We keep your financials clean year-round so filing season is straightforward instead of stressful.
Revenue Up, Cash Still Tight
Sales are growing but the bank account doesn't reflect it. You're not sure if it's a timing issue, a spending problem, or something else entirely. We track your cash flow, identify what's draining your margins, and give you the visibility to make real changes.
Why Choose ATS
We built this firm to bring real financial structure to small businesses.
20+ Years in Finance
Andrew Swaby built his career in banking and executive finance before founding ATS. That background in credit analysis, risk management, and operational leadership shapes how we approach every engagement. You get corporate-level financial discipline applied to your small business.
Published Author
Andrew wrote Numbers That Matter: A Business Owner's Guide to Smart Financial Choices to help business owners understand their financials and make better decisions. That same thinking is behind every service we deliver. We don't just record transactions. We make sure you understand what your numbers mean.
Built for Small Business
ATS exists because too many small businesses were stuck choosing between generalist bookkeepers and overpriced firms. We offer the structure and responsiveness of an in-house finance team without the overhead. Every process we've built is designed around how small businesses actually operate.
Based in Fairfax
Our office is in Fairfax and we work with businesses across Northern Virginia and the greater DMV. We deliver everything through secure, remote workflows with regular check-ins, giving you local accountability without requiring in-person meetings for every question.
Our Services
From monthly bookkeeping to fractional CFO support, everything your business needs to run an efficient back office.
Full-Service Bookkeeping
Transaction categorization, bank and credit card reconciliation, and monthly financial reporting so you always know where your business stands.
Catch-Up Bookkeeping
Cleaning up and bringing current past months or years of bookkeeping so your financials are accurate and usable again.
Bill Payment
We manage your accounts payable so every bill gets paid on time, properly tracked, and accurately recorded in your books.
Invoicing
Handling accounts receivable with invoicing and payment tracking. We send the invoices, follow up on payments, and keep your receivables organized so cash keeps moving.
Payroll System Setup & Training
We configure your payroll system correctly from the start and train you to run it on your own. Employee records, tax settings, pay schedules, and compliance details are all set up so you can process payroll with confidence every pay period.
Full-Service Payroll
Running payroll every pay period including tax deposits, quarterly filings, and year-end W-2s so you never miss a deadline or a deposit.
Xero Online Setup & Training
Get Xero configured correctly for your business from day one. We'll set up your chart of accounts, integrations, and workflows, then train you to use it with confidence.
Non-Profit Tax Returns
We prepare your annual Form 990, 990-EZ, or 990-T so your organization stays compliant and in good standing with the IRS.
Business Tax Returns
Annual federal and state business tax return preparation with all required schedules for S-Corps, C-Corps, partnerships, and sole proprietorships.
Personal Tax Returns
Individual federal and state tax return preparation including all income sources, deductions, and credits.
Tax Strategy
Proactive tax planning to minimize liability through entity structure, timing, deductions, and retirement strategies.
Budgeting & Cash Flow Forecasting
Creating budgets and projecting cash flow to plan for expenses, identify shortfalls, and support informed business decisions.
Financial Strategy
Analyzing financial data to guide business decisions on growth, profitability, pricing, and resource allocation.
Fractional CFO
Part-time CFO-level support, cash flow forecasting, analysis, and strategic planning.
IRS Tax Representation
When the IRS sends a notice or opens an audit, you don't have to deal with it alone. We step in as your authorized representative with Enrolled Agent authority, handle the communication, and work toward resolution so you can stay focused on your business.
Tax Audit Support
When the IRS or a state agency opens an audit, you need someone who knows what they're asking for and how to respond. We handle document preparation, response drafting, and walk you through the entire process.
Inventory Accounting
Tracking materials, supplies, and inventory items with proper counts and valuations. We maintain accurate records so your cost of goods sold and balance sheet reflect reality.
Business Formation
Setting up your business entity the right way from the start. LLC, S-Corp, or partnership formation with state registration and EIN acquisition so you can operate legally and with the right structure.
Industries We Work With
Every industry has its own financial patterns. We work with businesses in sectors where we've built real depth and understand what shows up in the books.
Real Estate
Real Estate
Every property is its own profit center. We track each one so you know exactly what's performing and what's draining your portfolio.
Healthcare
Professional
Healthcare revenue is complicated. Insurance payments, patient balances, and write-offs make it hard to know what you actually collected. We reconcile it all so you can see the real numbers.
Professional Services
Professional
You built your practice around expertise. But the financial side of running it doesn't manage itself.
Construction
Construction
You can be profitable on paper and still run out of cash. Job costing, retainage tracking, and WIP reporting give you the real picture of every project.
Transportation
Transportation
Freight runs on Cost Per Mile. We track fuel, maintenance, insurance, and fixed costs by truck so you know the true floor rate on every load you accept.
Nonprofits
Nonprofit
Every dollar has a purpose and someone watching. Your books need to show exactly where the money went and why.
20+
Years of Finance Experience
Certified
Xero & QuickBooks
Same Day
Response Time
What Our Clients Say
A few words from the business owners we work with.
"ATS is very reliable and efficient. My books were cleaned and updated in weeks before the deadline as well as I started getting reports on a monthly basis instead of annually, which was amazing."
Tj Millz
"ATS came to help us at a critical moment of transition. Andrew's insights and expertise has been vital to us as we make this internal change."
Michelle Zelsman
"The service was excellent. My expenses were managed properly and my books were well organized. I hope to do business with you guys again in the future."
Carlnetta Spaulding
"Great and efficient service. Helped me with tracking my personal income and expenses. Also set up a realistic budget for me to meet my needs."
Ronnie Ford
Northern Virginia's Bookkeeping & Advisory Firm
First Step:
Tell Us About Your Business
Every engagement starts with a conversation. Tell us what's going on with your books and we'll give you our honest assessment.
