Accounting & Tax
Bookkeeping, payroll, sales tax and returns.
Select services →BOSPHORUS FINANCIAL SERVICES
Your trusted financial partner in the United States
A strong bridge between your business and its goals.
Clear, responsive and strategic support—from accounting and tax to entity services, reporting and international trade.
50+State resourcesEN / TRBilingual supportCurrentBusiness resources
50-STATE RESOURCE CENTERSee key business requirements for your state.
Choose your state →THE STORY OF OUR NAME
Before it was a bridge,
it was a passage of myth and fortune.
Legend says IO crossed these dark waters with the anger of the gods behind her and two continents ahead.
BOUS · Ox / Cattle
Evokes IO, who was transformed into a cow in Greek mythology.
POROS · Passage / Crossing
Describes a passage from one shore to another.
Bosphorus means “ox crossing” and is associated with the legend of IO crossing the strait. For us, it symbolizes a strong bridge connecting continents, commerce and opportunity.
Commerce followed the legend. Black Sea grain, eastern silk and spices, gold coins and news from distant ports met in the same narrow waters. On Constantinople’s quays, every chest was weighed, every coin counted and every debt entered in a ledger. The Bosphorus connected more than continents: goods to value, journeys to accounts and trust to trade.
WHAT THE NAME MEANS TO US TODAY“Silk, spice and gold once found their way through this passage; today, businesses find theirs through sound records, trust and strategy.”
Continue reading the story →OUR SERVICES
One strong connection
for every stage of business.
From formation to closure, ownership changes to reporting, we tailor the scope to your business.
Business Lifecycle
Formation, closure and registration changes.
Select services →Ownership & Entity Type
Ownership changes and entity conversions.
Select services →Reporting & Valuation
Reports, feasibility studies and valuations.
Select services →Financial Advisory
Costing, pricing, cash flow and growth.
Select services →Import & Export
Landed cost, documentation and reporting.
Select services → MARKETS & ECONOMY
FED TARGET%3.50–%3.75EFFR%3.63U.S. CPI%3.4UNEMPLOYMENT%4.1USD/TRY48.07EUR/TRY56.23EUR/USD1.1699GBP/USD1.3656USD/JPY158.70USDT/USD1.0000FED TARGET%3.50–%3.75EFFR%3.63U.S. CPI%3.4UNEMPLOYMENT%4.1USD/TRY48.07EUR/TRY56.23EUR/USD1.1699GBP/USD1.3656USD/JPY158.70USDT/USD1.0000
WHY BOSPHORUS?
We do more than keep records.
We understand your business.
Responsive communication
You always know what is being done and what comes next.
Financial clarity
We explain what the numbers mean in plain language.
Solutions built around you
We tailor the scope to your structure and goals.
INSIGHTS & NEW ARTICLES
Current information.
Clear business decisions.
What Is FBAR and Who Must File?
The $10,000 aggregate threshold, FinCEN Form 114, recordkeeping, and the October 15 automatic extension.
Read the new FBAR article →Tax Laws Changed and Updated for 2026
Five important updates involving 1099 reporting, Section 179, bonus depreciation, research costs, and QBI.
Read the new article →Why Confirmation Letters Matter
How external confirmation supports reliable customer, vendor, bank, and loan balances.
Read the brief →Producing and Retaining Business Records
Federal record-production responsibilities and principal retention periods.
Read the brief →2026–2027 U.S. Federal Holidays
Official federal holiday dates, observed days, and practical notes for private employers.
Open the holiday calendar →TELL US WHAT YOU NEED
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BOSPHORUS FINANCIAL SERVICES
Organized numbers.
Stronger decisions.
We provide accounting, tax preparation and business advisory services. Bosphorus Financial Services is not a U.S. CPA firm.
Let us understand your business and define the solution you truly need.
info@bosphorusfinancial.com ↗+1 (415) 793-4396 ↗Send us a message ↗