Panama Tax Calendar 2026: All DGI Deadlines

For a formal business in Panama, missing a tax deadline is not just a fine. It is a mark on your tax compliance status with the DGI, a negative entry in your labor history with MITRADEL, and a friction point every time you need a clearance certificate for a tender, a bank loan, or to renew an operations notice. Keeping the calendar in order is the difference between operating calmly and constantly playing catch-up.

This guide organizes, month by month, every recurring deadline that affects formal businesses in Panama during 2026. It covers the five most frequent DGI obligations, the two monthly payroll filings (CSS and MITRADEL), the three installments of the 13th-month bonus, and annual accounting milestones such as the income tax return.

Important: exact deadlines may shift by decree or resolution when a date falls on a national holiday. Always confirm with your accountant or check the official calendars published by the DGI and the CSS before locking in your monthly plan.

The recurring obligations to plan for

Before the month-by-month calendar, it helps to be clear on what is due when at a high level. These are the obligations that repeat monthly or annually for every formal business in Panama:

Obligation	Frequency	Typical deadline	Authority
Form 430 (ITBMS return)	Monthly	15th of the following month	DGI
ITBMS withholdings	Monthly	15th of the following month	DGI
CSS payroll filing	Monthly	Last day of the following month	CSS
MITRADEL payroll	Monthly	Month-end	MITRADEL
13th-month bonus (3 installments)	Quarterly	April 15, August 15, December 15	Employer
Annual income tax return	Annual	March 31 (Dec 31 fiscal close)	DGI
Operations Notice renewal	Annual	Per original issue date	MICI
Annual Corporation Single Tax	Annual	July 15	DGI

Larger companies may have additional obligations: transfer pricing reports, country-by-country (CbC) reports, consolidated financial statements, ultimate beneficial owner registration, and others. This guide focuses on the calendar that applies to most SMEs and mid-sized formal businesses.

2026 fiscal calendar month by month

Below is the detail for each month. Referenced deadlines are the standard dates; when a date falls on a Saturday, Sunday or holiday, the deadline shifts to the immediately preceding business day, unless the DGI explicitly states otherwise.

January 2026

January 15: Form 430 ITBMS for December 2025; December withholdings.
January 30: CSS payroll for December 2025.
End of month: Begin preparing the income tax return for fiscal year 2025.

February 2026

February 15: Form 430 ITBMS for January; January withholdings.
February 27: CSS payroll for January.

March 2026

March 15: Form 430 ITBMS for February; February withholdings.
March 31: Annual Income Tax Return for fiscal year 2025 (legal entities with December 31 close). CSS payroll for February.

April 2026

April 15: Form 430 ITBMS for March; March withholdings. Payment of the first installment of the 13th-month bonus (January-April period).
April 30: CSS payroll for March. Start of the income tax payment period from the annual return (when installment payments apply).

May 2026

May 15: Form 430 ITBMS for April; April withholdings.
May 29: CSS payroll for April.

June 2026

June 15: Form 430 ITBMS for May; May withholdings.
June 30: CSS payroll for May. Second installment of estimated tax payments (when the advance regime applies).

July 2026

July 15: Form 430 ITBMS for June; June withholdings. Annual Single Tax for Corporations and Private Interest Foundations.
July 31: CSS payroll for June.

August 2026

August 15: Form 430 ITBMS for July; July withholdings. Payment of the second installment of the 13th-month bonus (May-August period).
August 31: CSS payroll for July.

September 2026

September 15: Form 430 ITBMS for August; August withholdings. Third estimated tax installment (when applicable).
September 30: CSS payroll for August.

October 2026

October 15: Form 430 ITBMS for September; September withholdings.
October 30: CSS payroll for September.

November 2026

November 15: Form 430 ITBMS for October; October withholdings.
November 30: CSS payroll for October.

December 2026

December 15: Form 430 ITBMS for November; November withholdings. Payment of the third and final installment of the 13th-month bonus (September-December period).
December 31: CSS payroll for November. Fiscal year close for most companies on a calendar fiscal period.

Year-end fiscal close milestones

The December 31 fiscal close kicks off a schedule of activities that runs through March of the following year. For a company on a calendar fiscal year, the critical milestones are:

January: consolidation of accounting balances, final bank reconciliations, inventory valuation and AR review.
February: closing adjustments, depreciation and amortization, labor provisions (13th-month, vacations, seniority premium), review of deferred tax items.
March: issuance of IFRS financial statements, preparation of the annual income tax return, and filing with the DGI before March 31.

Companies above external audit thresholds must also coordinate with their audit firm during this period. The audit covers the financial statements of the closed year and must be available when the return is filed or shortly after.

Late-filing penalties

Penalties for non-compliance vary by obligation and length of delay, but they are significant and they add up. As general reference:

Late Form 430 (ITBMS): percentage fine on the tax due, with a balboa minimum that applies even to zero-tax filings.
Late income tax payment: surcharge and interest on the amount owed, calculated from the original deadline.
Late CSS payroll filing: percentage fine on contributions plus late-payment surcharges.
13th-month bonus paid after deadline: labor infraction sanctioned by MITRADEL, with fines that can multiply by number of affected employees.

Beyond fines, the reputational impact is real: the DGI publishes each taxpayer's tax-compliance status, and clearance certificates are required to operate with the State, participate in tenders, receive public-sector payments, and maintain sectoral permits.

How to keep the calendar under control

The artisanal way to manage this calendar is a spreadsheet with reminders and an external accountant who flags each upcoming deadline. It works until it does not: when the company grows, adds operations, opens a second entity or expands to another country, the deadlines multiply and spreadsheets stop being reliable.

The modern alternative is to operate the fiscal cycle from the same ERP that records the operation. When your accounting system already has every invoice (with CUFE), every payment, every payroll record and every contribution, generating Form 430, the CSS payroll and the reports for the annual return is a matter of minutes, not days. And deadline reminders live in the system, not in someone's head.

If your accounting team is spending more time assembling returns than analyzing the business, it is probably time to reassess the stack. Check our complete Panama tax compliance guide to dig into each obligation, or talk to a certified cifraHQ partner for a live demo.