Filing taxes can feel overwhelming for small business owners. Understanding tax filing deadlines is essential for every US small business, and knowing when to start filing can help you stay compliant, avoid penalties, and manage cash flow. Professional corporate tax services in US can guide business owners through the process, making tax season simpler and more organized.
Different business structures have different filing requirements. Here’s a clear breakdown for 2025 filings covering 2024 income:
For sole proprietors and single-member LLCs, income is reported on personal tax returns:
File Schedule C with Form 1040.
Deadline: April 15, 2025.
Profits flow directly to your personal tax return, simplifying reporting.
Multi-member LLCs and partnerships file as a group, with income passing through to individual members:
File Form 1065 (Partnership Return).
Deadline: March 17, 2025.
Members report their share of income on Schedule K-1, attached to personal returns.
C-Corps are taxed separately from owners, offering options for retained earnings and growth:
File Form 1120.
Deadline: April 15, 2025 (calendar-year corporations).
S-Corps combine corporate structure with pass-through taxation for shareholders:
File Form 1120S.
Deadline: March 17, 2025.
Many small business owners must make quarterly estimated payments if they expect to owe taxes beyond IRS thresholds. This helps spread tax liability throughout the year:
Due Dates for 2025:
April 15, 2025
June 16, 2025
September 15, 2025
December 15, 2025
Applies to sole proprietors, partnerships, LLCs, and corporations expecting significant tax liability.
Paying quarterly helps manage cash flow and ensures compliance.
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The IRS usually begins accepting returns in late January, giving businesses time to file accurately:
For 2025 filings covering 2024 income: late January 2026.
Filing early can speed up refunds and allow extra time to resolve any issues.
Navigating tax deadlines and forms can be complex. Professional corporate tax services in US provide support to:
Ensure compliance – Correctly file all IRS forms (Schedule C, Form 1065, Form 1120, Form 1120S).
Track deadlines – Avoid late-filing penalties.
Plan taxes strategically – Optimize estimated payments and deductions.
Align taxes with growth goals – Make informed decisions for your business structure and long-term strategy.
US small business owners should be aware of key tax filing deadlines for 2025 filings covering 2024 income. Sole proprietorships and single-member LLCs must file by April 15, 2025, while multi-member LLCs and partnerships are due March 17, 2025. C Corporations file by April 15, 2025, and S Corporations by March 17, 2025. Additionally, businesses expecting to owe taxes beyond IRS thresholds should make quarterly estimated payments in April, June, September, and December 2025. Staying on top of these deadlines helps businesses remain compliant, avoid penalties, and manage cash flow efficiently.
Stop coordinating between different providers. Counto’s combined accounting and tax plans give you a single solution at a predictable price. Our intelligent platform manages your books while tax experts handle your filing. Want to learn more about our all-in-one plans? Chat with us now, email [email protected], or use our contact form.
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