Accurate, tax-ready books delivered monthly, so you always know where your business stands.
Small business bookkeepers serving Denver, Aurora, Centennial, Lakewood, Colorado Springs, and all 50 states with dedicated, in-house teams.
- In-house team
- Secure document upload
- Monthly reporting
- Year-round support
- All 50 states
Why Bookkeeping Slips, and What It Costs
Transactions fall behind
A few busy months turn into a backlog of uncategorized transactions. Once the books drift, every report built on them drifts with them.
Reports do not match reality
Unreconciled bank and credit card accounts hide duplicate charges and missing deposits, so the profit number on your statement is not the profit in your account.
Tax season becomes a scramble
When the books are not closed each month, the work does not disappear. It piles up in March, when documentation is hardest to reconstruct.
What Our Bookkeeping Includes
Monthly bookkeeping
Transaction coding, categorization, and a monthly close on a set schedule. You receive current financials instead of a year-end surprise.
Catch-up bookkeeping
Months or years of backlog brought current, one period at a time. We rebuild the ledger so past filings and future reporting line up.
Bank reconciliation
Bank and credit card accounts reconciled against statements every period, so duplicates, missing deposits, and bank errors surface early.
Accounts payable
Vendor bills tracked, coded, and scheduled so nothing is paid twice or paid late. You keep approval control over every payment.
Accounts receivable
Invoices issued and tracked with aging visibility, so you know which customers are current and which need a follow up.
Multi-state compliance bookkeeping
Books structured by state and entity where you operate in more than one jurisdiction, so filings pull from clean, separated records.
QuickBooks setup and optimization
Chart of accounts, bank feeds, and rules configured for how your business actually operates, in QuickBooks Online or Xero.
Financial statement preparation
Profit and loss, balance sheet, and cash flow statements prepared each period and reviewed with you when questions come up.
Free consultation to confirm what your books need before any work starts.
Why Bookkeeping Matters More Than You Think
Your books aren't just for tax season, they're the foundation for every financial decision in your business. From cash flow planning to loan applications to exit strategy, the quality of your bookkeeping directly impacts the quality of your outcomes.
Foundation for Growth
Accurate bookkeeping is the backbone of smart business decisions. Know your cash flow, profitability, and margins at a glance, so you can invest, hire, and expand with confidence. Businesses with clean, up-to-date books are more likely to secure financing, pass due diligence, and make data-driven decisions that drive sustainable growth.
Prevent IRS Issues
Clean, organized records reduce audit risk and help you're capturing every legitimate deduction. Messy books lead to missed opportunities and potential penalties. The IRS expects documentation for every deduction you claim, proper bookkeeping provides that paper trail automatically, so you're always prepared if questions arise.
Clarity for Decisions
From securing loans to pricing your services, reliable financials give you the data you need. Stop guessing, start planning with numbers you can trust. Whether you're evaluating a new hire, considering a lease, or deciding whether to expand into a new market, your books should give you a clear answer.
Cash Flow Visibility
Cash flow is the lifeblood of any business, yet most owners don't have a clear picture until it's too late. Monthly bookkeeping gives you a real-time view of money in versus money out, helping you time vendor payments, plan for seasonal dips, and maintain healthy reserves for unexpected expenses.
Maximize Profitability
You can't improve what you don't measure. Accurate bookkeeping reveals your true profit margins by product, service, client, or project. This insight allows you to double down on what's working, cut what isn't, and price your offerings to reflect the real cost of delivery.
Audit & Compliance Readiness
Whether you face an IRS audit, a state sales tax review, or a lender requesting financials, properly maintained books mean you're always ready. No scrambling, no reconstructing transactions from memory. Your records are organized, reconciled, and defensible from day one.
What Happens When Bookkeeping Falls Behind
Messy books don't just cause headaches at tax time, they silently erode your profitability, increase your risk, and limit your ability to grow. Here's what's really at stake.
Missed Tax Deductions
$5,000-$20,000+Businesses with disorganized books routinely miss legitimate deductions, from home office expenses and vehicle mileage to retirement contributions and depreciation. These aren't edge cases; they're the basics that get lost when categorization is sloppy or transactions go unrecorded.
IRS Penalties & Interest
Up to 25%Late filing, underpayment, and accuracy-related penalties can stack up fast. The IRS failure-to-pay penalty alone is 0.5% per month, and accuracy penalties can reach 20% of the underpayment. Clean books prevent these entirely.
Wasted Owner Time
10-20 hrs/monthBusiness owners who try to manage their own books spend an average of 10-20 hours per month on financial tasks, time that could be spent on sales, operations, or growth. Professional bookkeeping gives that time back.
Bad Business Decisions
ImmeasurableWhen your P&L is wrong, your decisions are wrong. Overestimating profitability can lead to overspending. Underestimating cash flow can mean missing payroll. Accurate books are the foundation of every sound business decision.
Behind on Your Books? No Judgment Here.
It happens to the best of us. Whether you're a few months or a few years behind, we'll get everything caught up quickly and cleanly.
Detailed Service Breakdown
Here's exactly what's included in each bookkeeping service, no vague descriptions, no hidden add-ons. You'll know exactly what you're getting.
Monthly Bookkeeping
Consistent, accurate financial management delivered every month, so you always know where your business stands.
What's Included:
Ideal for: Businesses with 50+ monthly transactions that want reliable, tax-ready financials delivered on a predictable schedule.
Learn MoreCatch-Up Bookkeeping
Months or years behind? We bring your books current, accurately, quickly, and without judgment.
What's Included:
Ideal for: Businesses that have fallen behind on bookkeeping, whether by a few months or a few years, and need clean financials for tax filing, lending, or investor reporting.
Learn MoreAccounts Payable Management
Track what you owe, optimize payment timing, and never miss a vendor deadline.
What's Included:
Ideal for: Businesses with regular vendor payments, subcontractor invoices, or recurring expenses that need systematic tracking.
Learn MoreAccounts Receivable Management
Monitor outstanding invoices, track payments, and maintain healthy cash flow.
What's Included:
Ideal for: Service businesses, agencies, and B2B companies that invoice clients and need reliable visibility into outstanding receivables.
Learn MoreBank Reconciliation
Every dollar accounted for. Every account balanced. Every month.
What's Included:
Ideal for: Any business that wants confidence their books match reality, especially those with multiple bank accounts, credit cards, or payment processors.
Learn MoreWhat We Handle
From daily transactions to year-end prep, we manage every aspect of your bookkeeping.
Bookkeeping & Monthly Accounting
Monthly Bank Reconciliations
Match every transaction to your statements
Credit Card Reconciliations
Track spending across all business cards
Income & Expense Categorization
Accurate coding for tax-ready books
Chart of Accounts Organization
Clean structure for clear reporting
Rule Automation for Recurring Transactions
Save time with smart categorization rules
Merchant Processor Matching
Stripe, Square, PayPal reconciliation
Accounts Payable Support
Accounts Receivable Support
Financial Statements (Delivered Monthly)
Catch-Up & Clean-Up Bookkeeping
QuickBooks & System Setup
Not sure where your books stand? We'll start with a diagnostic review and recommend the right package.
Industry-Specific Bookkeeping Expertise
Every industry has unique financial workflows, compliance requirements, and reporting needs. Here's how our bookkeeping adapts to yours, with real examples of what we track and why it matters.
Contractors & Construction
Construction bookkeeping requires project-level tracking that goes far beyond standard categorization. We set up job costing in your accounting software so you can see profit margins by project, track change orders, and reconcile progress billings against actual costs. If you're bonded, we help protect your financials meet surety requirements.
What we track:
Real Estate & Property Management
Whether you manage 3 rentals or 300 units, we provide property-level financial tracking that separates income and expenses by property, unit, or portfolio. Our bookkeeping supports Schedule E filing, cost segregation studies, and investor reporting, giving you and your partners clear visibility into returns.
What we track:
Healthcare & Medical Practices
Medical practices have unique bookkeeping needs, from tracking insurance reimbursements and patient co-pays to managing provider-specific revenue. We maintain HIPAA-conscious financial records and coordinate with your billing company to address every dollar is properly categorized and reconciled.
What we track:
Restaurants & Hospitality
Restaurant bookkeeping is high-volume and time-sensitive. We reconcile daily POS settlements, track food and beverage costs as a percentage of revenue, manage tip reporting compliance, and deliver labor cost analysis, so you know your prime cost ratio and can make pricing decisions with confidence.
What we track:
E-Commerce & Retail
If you sell on Amazon, Shopify, Etsy, or your own website, your bookkeeping needs to account for marketplace fees, shipping costs, returns, and multi-state sales tax. We reconcile all channels into a single P&L and track inventory valuations using the method that makes the most sense for your business.
What we track:
Professional Services & Agencies
Law firms, marketing agencies, consulting firms, and other professional services businesses need bookkeeping that tracks profitability by client or project. We set up class tracking, monitor utilization rates, and calculate partner distributions, giving firm owners the data they need to grow profitably.
What we track:
Transportation & Trucking
Trucking companies face unique financial complexity, from IFTA fuel tax reporting and per-mile cost calculations to equipment financing and driver settlement reconciliation. We build these workflows into your monthly bookkeeping so you always know your cost-per-mile and can bid jobs accurately.
What we track:
Home Service Businesses
Plumbers, electricians, HVAC companies, and landscapers need bookkeeping that tracks revenue and costs at the job level. We categorize materials, labor, and overhead per job, and help you understand seasonal patterns so you can plan cash reserves and marketing spend accordingly.
What we track:
Don't see your industry? We work with businesses across every sector.
Browse All IndustriesYour Dedicated Bookkeeping Team
You won't be passed around. Our bookkeepers get to know your business inside and out, so your books are always accurate and your questions always get answered.
"We treat every client like they're our only client."
Schedule a Free ConsultationWho We Help
Industry-specific bookkeeping expertise for businesses across Denver and nationwide.
Multi-State Bookkeeping & Compliance
Selling across state lines, hiring remote workers, or expanding into new markets? Multi-state compliance is one of the fastest-growing complexities for small businesses, and getting it wrong can mean penalties, back taxes, and lost time. We build compliance into your books from day one.
States with income tax or franchise tax requirements
Sales tax jurisdictions in the U.S.
Common economic nexus thresholds
Filing frequencies by state (monthly, quarterly, annual)
Sales Tax Nexus
If your business has economic nexus in multiple states, whether through remote employees, inventory, or exceeding revenue thresholds, you may be required to collect and remit sales tax in each jurisdiction. We track evolving nexus rules across all 50 states so you don't have to.
Learn about Nexus AnalysisPayroll Tax Withholding
Each state has its own income tax withholding rates, unemployment insurance requirements, and filing deadlines. When you have employees or contractors in multiple states, proper payroll setup prevents costly penalties and ensures accurate W-2 reporting.
Payroll Tax Filing ServicesState Income Tax Filing
Operating in multiple states often means filing separate state income tax returns. We coordinate with your tax team to help protect your bookkeeping supports accurate apportionment and allocation across jurisdictions.
State Tax Filing ServicesAnnual Report & Compliance Filings
Many states require annual reports, franchise tax filings, or registered agent renewals. We maintain a compliance calendar so you never miss a deadline that could put your business in bad standing.
Business Consulting ServicesDon't Wait for a Notice
States are aggressively enforcing nexus rules, especially after the 2018 South Dakota v. Wayfair Supreme Court decision. If you're selling products or services across state lines, even digitally, you may already have filing obligations you're not meeting. Our bookkeeping team proactively identifies your nexus exposure and builds compliant processes into your monthly workflow.
Software We Integrate With
Your business runs on multiple platforms. We connect them all into a single, accurate financial picture, eliminating double-entry, reducing errors, and giving you real-time visibility into your numbers.
Accounting Platforms
We work primarily in QuickBooks Online, but we also support clients on Xero, FreshBooks, and Wave. If you're using desktop software and want to migrate to the cloud, we handle the full conversion, mapping your chart of accounts, importing historical data, and verifying opening balances.
Payment Processors
Whether you collect payments through Stripe, Square, PayPal, or another processor, we reconcile deposits to your bank and match fees accurately. No more guessing why your bank deposit doesn't match your invoice total.
Payroll Systems
We sync with your payroll provider to record journal entries, track liabilities, and maintain proper expense categorization, from gross wages to employer taxes, benefits, and retirement contributions.
E-Commerce & POS
Selling online or in-store? We integrate your sales channels directly into your books, reconcile inventory movements, and track cost of goods sold, so your P&L reflects real gross margins.
Expense & Receipt Management
We connect expense management tools that let you snap photos of receipts, auto-categorize purchases, and sync everything to your accounting file, reducing manual entry and keeping your records audit-ready.
Automation & Workflows
We leverage automation tools to eliminate repetitive data entry, create recurring transactions, and trigger alerts when something looks off, saving you time and reducing human error across your financial workflows.
Not Sure What Bookkeeping Package You Need?
Every business is different. Let's have a quick chat and we'll recommend exactly what makes sense for your situation, no upselling, ever.
Our Bookkeeping Process
A streamlined, four-step approach that keeps your books accurate, your time free, and your financials ready for any purpose, from tax filing to loan applications to investor reporting.
Free Consultation & Assessment
We start with a free call to understand your business, review your current books, and identify the right service level. If you're behind, we'll scope the catch-up project. If you're current, we'll plan for a seamless transition.
Onboarding & Account Connection
We connect your bank accounts, credit cards, and merchant processors through encrypted, read-only connections. We set up or optimize your chart of accounts and configure automation rules to reduce manual entry going forward.
Monthly Reconciliation & Categorization
Each month, we match every transaction to your statements, apply consistent coding, and catch discrepancies before they become problems. We review for unusual activity, missed categorizations, and optimization opportunities.
Financial Reports & Ongoing Support
Receive monthly financials, P&L, Balance Sheet, and Cash Flow Summary, with a performance review highlighting key trends. Your dedicated bookkeeper is available year-round for questions, ad-hoc reports, and strategic insights.
Most clients are fully onboarded within 1-2 weeks and receive their first monthly financials within 15-30 days of month-end.
How Our Bookkeeping Process Works
- Step 1
Schedule a free consultation
Tell us what software you use, how far behind you are, and what reporting you need. There is no cost for the conversation.
- Step 2
Review your current records
We look at your existing file, bank connections, and chart of accounts to see what is accurate today and what needs rebuilding.
- Step 3
Receive a tailored bookkeeping plan
We confirm scope, cleanup work, reporting cadence, and fee before any work begins, so there are no surprises later.
- Step 4
Ongoing monthly close and support
Your books are reconciled and closed on schedule, financials are delivered, and your bookkeeper stays available between closes.
Step one takes about 20 minutes and there is no cost to talk.
Why Choose Centennial Accounting Group for Bookkeeping
A dedicated bookkeeper
You work with the same person each month, so nobody has to relearn how your business records revenue.
Tax-ready books
Our tax team files from the same records, so the close and the return are built on one set of numbers.
Cleanup work welcome
Backlogged files, mixed personal and business accounts, and abandoned software migrations are routine work here.
Reporting on a schedule
Statements arrive each period rather than on request, so decisions are made with current numbers.
What Bookkeeping Clients Say
"Very professional. Made sure that I understood everything that was happening as it was happening. Best accounting services I have ever received."
Your books are maintained by our in-house Denver team using QuickBooks Online and Xero, and reviewed by the same tax professionals who prepare returns from those records.
Why Businesses Nationwide Choose Us
Headquartered in Denver, Colorado, Centennial Accounting Group delivers professional bookkeeping services to businesses in all 50 states. We combine the responsiveness of a local firm with the technology and expertise to serve clients anywhere in the country.
Businesses served nationwide
Google rating across 100+ reviews
Years of combined team experience
States served from our Denver headquarters
Dedicated Bookkeeping Team
You won't be passed around to a different person each month. Every client is assigned a dedicated bookkeeper backed by a senior accountant, so your team knows your business, your chart of accounts, and your preferences.
Tax-Integrated Approach
Unlike standalone bookkeeping services, we coordinate directly with our in-house tax team. That means your books are optimized for deductions, your year-end is seamless, and you never scramble during tax season.
15-30 Day Turnaround
We close your books within 15-30 days of month-end, giving you timely financials for decision-making, loan applications, and investor reporting. Many competitors take 45-60 days or more.
Industry-Specific Expertise
From job costing for contractors to tip reporting for restaurants to HIPAA-compliant recordkeeping for medical practices, we bring niche knowledge that general bookkeepers simply don't have.
Proactive Communication
We don't just send a report and disappear. When we spot unusual expenses, cash flow concerns, or opportunities to save, we flag them. Your bookkeeper is a financial partner, not just a data entry clerk.
"We don't believe in one-size-fits-all bookkeeping. Every business has unique reporting needs, industry-specific requirements, and growth goals, and our service reflects that."
, Centennial Accounting Group Team
What You'll Need to Get Started
Here's what we'll need during onboarding. Don't worry if you don't have everything, we'll work with what you have and help you fill in the gaps.
Required for All Clients
- Bank account login or monthly statements (all business accounts)
- Credit card login or monthly statements (all business cards)
- QuickBooks Online login (or we'll set up a new account for you)
- Prior year tax return (most recent, for baseline reference)
If Applicable to Your Business
- Merchant processor access (Stripe, Square, PayPal, etc.)
- Payroll provider login or reports (Gusto, ADP, Paychex, etc.)
- E-commerce platform access (Shopify, Amazon Seller Central, etc.)
- POS system access (Toast, Clover, Lightspeed, etc.)
- Loan or lease agreements (for proper amortization scheduling)
- Subcontractor or vendor W-9s (for 1099 tracking)
- Insurance certificates (for proper expense categorization)
- Prior financial statements or bookkeeper reports (if available)
Helpful But Not Required
- Chart of accounts preferences or reporting requirements
- List of business goals, KPIs, or reporting needs
- Budget or forecast documents (if you have them)
- Investor or lender reporting templates
Don't have everything ready?
No problem. Many clients start with just bank access and a QuickBooks login. We'll guide you through everything else during onboarding and help you organize what's missing. Our goal is to make the process as easy as possible, not to create more work for you.
Schedule Your Free ConsultationBookkeeping FAQ
Everything you need to know about our bookkeeping services, pricing, process, software, and more.
Bookkeeping for Denver and the Colorado Front Range
Local, in-house bookkeepers for small businesses across the Denver metro and Colorado Front Range. Monthly books, catch-up work, and QuickBooks/Xero support, all handled by a dedicated team based right here in Cherry Creek.
Local response: Same-week onboarding for Denver-area businesses.
Denver Metro Cities Served
Front Range Cities Served
- Colorado Springs
- Fort Collins
- Boulder
- Longmont
- Loveland
- Greeley
- Castle Rock
- Parker
Headquartered at 3773 Cherry Creek N Dr, West Tower Suite 630, Denver, CO 80209 · Serving the entire Denver metro, Colorado Front Range, and all 50 states remotely.
Explore Bookkeeping Services
Solutions for every bookkeeping need
Stress-Free Bookkeeping Starts Here
Get accurate financials, tax-ready books, and a dedicated team you can actually reach, no matter where your business is located.