Valrico · Tampa Bay · Remote statewide
Books you can trust, and someone who picks up the phone.
Bookkeeping, tax preparation, and plain-English analysis of where your money actually goes — for Tampa Bay small businesses and the self-employed. Prices are published below. You don't need a sales call to find out what it costs.
What we do
Three ways we work together
Most clients start with one and add the others as they grow. You are never quoted for work you did not ask about.
Bookkeeping
The core of the practice. Your books stay current and closed each month, so tax season is a formality instead of an emergency.
- Transaction categorization and bank reconciliation
- Monthly profit & loss and balance sheet
- Accounts receivable and payable
- Payroll processing and filings
- Florida sales tax (DR-15) filing
- Year-end 1099 preparation
- Catch-up and cleanup for neglected books
Tax preparation
Individual and business returns, prepared by someone studying taxation at the graduate level — and who already knows your numbers.
- Individual returns (1040), simple through multi-schedule
- Self-employment and Schedule C
- Rental property and Schedule E
- Partnership (1065) and S-corp (1120-S) returns
- Multi-state returns for out-of-state income
- Quarterly estimated payment schedules
Analysis & advisory
Bookkeeping tells you what happened. This tells you what to do about it — built with real database and visualization work, not a screenshot of a spreadsheet.
- LLC vs. S-corp election analysis, with breakeven math
- Margin analysis by product, service, or client
- Cash-flow forecasting
- Custom dashboards built in Tableau
- SQL and R analysis of messy transaction data
- Personal spending and subscription review
Pricing
Published, because you deserve to know before you call
Bookkeeping tiers are set by scope and transaction volume, not by hours. You should not pay more because a job took me longer than it should have. The first ten clients lock in a founding rate for a year — shown on each tier below.
Sole proprietors and side businesses finding their footing.
Founding client rate — first 10 clients, locked 12 months
- Up to 2 financial accounts
- About 100 transactions per month
- Bank and credit card reconciliation
- Monthly profit & loss
- Clean, organized ledgers
Growing businesses that need real numbers to make decisions on.
Founding client rate — first 10 clients, locked 12 months
- Everything in Essential
- Up to 4 accounts, about 300 transactions
- Accounts payable and receivable
- Monthly 30-minute review call
- Cash-flow monitoring and forecast
- Balance sheet and retained earnings
Your whole finance function, handled end to end.
Founding client rate — first 10 clients, locked 12 months
- Everything in Professional
- Payroll management and reconciliation
- Sales tax filing and compliance tracking
- Quarterly 60-minute strategy calls
- Custom financial dashboard
- Year-end tax prep coordination
Higher volume, multiple entities, or inventory? Those get a real quote after a short diagnostic — not a number invented on a call.
Business add-ons
Priced separately so you only pay for what your business actually uses.
| Service | Price |
|---|---|
| Payroll processing, up to 10 employees (direct deposit, withholding, 941s, W-2s) | $149 / month |
| Each additional employee | $10 / month |
| Catch-up & cleanup bookkeeping | $250 per month of backlog |
| Florida sales tax filing (DR-15) | $75 per filing |
| 1099-NEC preparation | $75 setup + $15 per form |
| Florida annual report filing | $100 + state fee |
Tax preparation
Bookkeeping clients receive 25% off any return — the books are already done.
| Return | Starting at |
|---|---|
| Individual (1040), W-2 and standard deduction | $149 |
| Self-employed / 1099 contractor (Schedule C, home office, mileage) | $299 |
| Multi-schedule (rentals, multi-state, digital assets) | $450 |
| Partnership return (1065) | $850 |
| S-corporation return (1120-S) | $850 |
| Quarterly estimated payment schedule | $150 / year |
Tax preparation
Accepting tax clients for tax year 2026. Reach out now to reserve a spot for filing season — pricing confirmed once engaged.
| Return | Typically |
|---|---|
| Individual (1040), W-2 and standard deduction | from $149 |
| Self-employed / 1099 contractor (Schedule C, home office, mileage) | from $299 |
| Multi-schedule (rentals, multi-state, digital assets) | from $450 |
| Partnership return (1065) | from $850 |
| S-corporation return (1120-S) | from $850 |
| Quarterly estimated payment schedule | $150 / year |
Analysis & advisory
Priced as projects, because what you're buying is the answer, not the hours.
| Engagement | Price |
|---|---|
| Entity structure review (LLC vs. S-corp, with breakeven analysis) | $500 |
| Custom financial dashboard | $750 setup, then $150 / month |
| Personal budgeting & cash-flow session, 90 minutes | $200 |
| Business strategy session, 90 minutes | $250 |
About
Meet Mark Mindov
Castle Accounting Services LLC is a Valrico-based practice built on a straightforward idea: small businesses deserve the same quality of financial information that large ones take for granted, without the overhead of a large firm.
I hold a bachelor's degree in accounting from the University of South Florida and am completing a Master of Science in Taxation at Western Governors University. I plan to sit for the CPA exam once the master's is finished.
My day job is corporate staff accountant at an insurance operation, where I reconcile multi-million-dollar monthly premium and commission activity. That work is where the habits come from — reconcile everything, document everything, and never hand over a number you can't trace back to its source. Your books get the same treatment.
I'm also QuickBooks Online certified and trained in data analytics: SQL, R, and Tableau. In practice that means your monthly reports aren't a ledger dump. They answer questions. Which service line is actually profitable. Where margin is leaking. What next quarter's cash looks like.
Serving Tampa Bay & statewide remote
M.S. Taxation, WGU (in progress)
SQL · R · Tableau
You work with me directly. There is no account manager, no ticket queue, and no waiting a week for an answer that takes four minutes.
Straight about credentials.
Castle Accounting Services LLC is not a CPA firm. We do not perform audits, reviews, compilations, or any attest services, and we do not issue opinions on financial statements. If your situation requires attest work, I will tell you plainly and help you find a licensed CPA.
What I do provide: bookkeeping, payroll, tax preparation, and financial analysis and advisory services.
Contact
Get your free Books Health Check
Thirty minutes, screen-share optional. I look at your actual books, flag three specific problems, and send you a one-page memo within 24 hours — whether or not you hire me. If we're a fit for ongoing work I'll say so, and if you'd be better served elsewhere I'll tell you that too.