Compliance handled end to end
C-corporations pay tax at the entity level at a flat federal rate of 21%, plus state and sometimes local income or franchise taxes. On top of the annual return come quarterly estimated payments, information returns and, for companies with international activity, cross-border reporting. We coordinate all of it on one calendar.
We work with companies that operate only in the US and with companies that have operations, owners or sister companies in other countries.
Our corporate services
Tax compliance
Federal corporate returns (Form 1120), state and local income and franchise tax returns, and extensions.
Tax accounting
Book-to-tax reconciliation, tax provision support and depreciation schedules.
Estimated taxes
Quarterly estimated payment calculations to avoid underpayment penalties.
Cross-border consultation
Guidance for foreign-owned US companies and US companies with foreign operations, including information returns.
Audit support
Preparing documentation and representing the company in IRS and state examinations.
Handling questions from the IRS and state tax agencies
Responding to IRS and state notices, registrations and account issues on your behalf.
What's included
- One manager who coordinates everything for your company
- A compliance calendar covering every federal, state and local deadline
- Preparation and e-filing of Form 1120 and state returns
- Quarterly estimated tax calculations and payment reminders
- Year-end planning to time income and deductions
- Coordination with your payroll provider and auditors
Key deadlines
For calendar-year corporations, Form 1120 is due by April 15, with an optional six-month extension to file. Estimated tax payments are generally due in April, June, September and December.
Frequently asked questions
Does an extension also extend the time to pay?
No. An extension gives more time to file the return, but tax owed must still be paid by the original due date to avoid interest and penalties.
We operate in several states. Where do we need to file?
Generally in every state where the company has "nexus," meaning enough presence such as employees, property or sales. We review your activity and register you where it's required.
Can you work with our existing bookkeeper or accountant?
Yes. We regularly work alongside in-house finance teams and outside bookkeepers.
