10 Tax Deadlines Every Nepali Business Owner Must Never Miss
Running a business in Nepal means juggling more tax deadlines than most owners initially realize — monthly TDS deposits, periodic VAT returns, three separate advance tax installments, and the annual return, each with its own date and its own penalty for missing it. Losing track of even one of these can trigger interest and fees that compound the longer they go unaddressed. This guide lists the ten deadlines that matter most, with a short explanation of each, so you can build them into your business calendar once and stop tracking them from memory.
Monthly and Periodic Obligations
1. Monthly TDS deposit and filing: Tax deducted at source from employee salaries, vendor payments, rent, and other specified payments must be deposited and reported to the IRD within the prescribed monthly window. This is one of the most frequent recurring obligations a business faces and is easy to overlook amid other monthly priorities like payroll processing itself.
2. Monthly or trimester VAT return filing and payment: VAT-registered businesses must file returns and remit VAT collected, on either a monthly or trimester basis depending on their registration category, by the applicable due date each period. Missing this triggers both a late filing fee and interest on any unpaid VAT.
3. E-billing / CBMS data transmission compliance: Businesses required to use the electronic billing system must ensure invoice data is being correctly and consistently transmitted to the central monitoring system, since gaps here can be flagged separately from the VAT return itself and carry their own compliance consequences.
Advance Tax Installments
4. First advance tax installment (Poush end): Businesses and individuals with a tax liability above the advance tax threshold must pay the first installment of their estimated annual tax liability by the end of Poush (mid-January), typically representing a meaningful portion of the total estimated liability for the year.
5. Second advance tax installment (Chaitra end): A further cumulative installment is due by the end of Chaitra (mid-April), building toward the full estimated annual liability being paid across the three installments rather than in one lump sum at year-end.
6. Third and final advance tax installment (Ashad end): The final installment, completing the full estimated tax liability for the year, is due by the end of Ashad (mid-July), coinciding with the close of the fiscal year itself.
Annual Obligations
7. Annual income tax return filing deadline: The annual return, reconciling actual income, expenses, and tax liability for the full fiscal year against advance payments and TDS credits already made, is due within the prescribed period after the fiscal year-end — generally around the end of Ashwin (mid-October) for many filers, though companies should confirm their specific applicable deadline given the audit and AGM sequence involved.
8. Annual statutory audit completion and AGM approval: For companies, the statutory audit of annual financial statements, followed by board and AGM approval, needs to be completed with enough buffer before the annual filing deadline, since the return itself depends on these audited, approved accounts being finalized first.
9. TDS certificate issuance to employees and vendors: Businesses that have withheld TDS throughout the year are generally expected to issue TDS certificates to employees and vendors within a prescribed period after the fiscal year-end, confirming the amounts withheld and deposited on their behalf — a step that's easy to deprioritize but that recipients depend on for their own filing.
Registration and Renewal
10. Business/trade license and municipal registration renewal: Separate from federal tax deadlines, most municipalities require annual renewal of local business or trade licenses, often with their own specific renewal window — missing this can create complications even if all federal tax obligations are otherwise current.
Save This Calendar for Your Business
The image above is designed to be saved, printed, or pinned somewhere visible so these ten dates stop needing to be tracked from memory. Right-click (or long-press on mobile) to save it, and consider setting calendar reminders a few days ahead of each deadline rather than on the exact date, giving yourself a buffer to handle any last-minute document gathering.
Frequently Asked Questions
Which of these deadlines has the harshest penalty for missing?
It's difficult to single out one deadline as universally "the harshest," because the actual financial impact of missing any of these depends heavily on the amount of tax involved and how long the delay continues — interest accrues on unpaid tax for as long as it remains unpaid, so a large amount left unpaid for months after any of these deadlines will generate a larger absolute cost than a small amount paid just a few days late. That said, a few of these deadlines carry a combination of consequences that make them particularly costly to miss in practice. Missing VAT return filing deadlines repeatedly, or by a significant margin, can in serious cases put a business at risk of registration-related consequences beyond just the fee and interest, since consistent non-filing is treated more seriously than an isolated delay. Missing advance tax installments, particularly the earlier ones, means interest can accrue on the shortfall for the extended remainder of the year until it's caught up or the final annual reconciliation happens, meaning an early missed installment can quietly accumulate a larger interest cost than it first appears to, simply because of how much time is left in the year for that interest to run. The annual return deadline for companies is particularly consequential because it sits at the end of a dependency chain — a late audit or delayed AGM can cascade into a late annual filing, and corporate late filing penalties, as discussed elsewhere, are often calculated with reference to the business's scale rather than a simple fixed fee, meaning the absolute cost for a larger company missing its annual filing can be substantial. Rather than trying to rank these by "harshest" in the abstract, the more useful practical takeaway is that the cost of missing any of them grows with both the amount of tax involved and the length of the delay — which is exactly why building in calendar reminders well ahead of each date, rather than relying on memory, is the single most effective way to avoid the cost question ever becoming relevant in the first place.
Do sole proprietors need to worry about all ten of these deadlines?
Not necessarily all ten — some, like the statutory audit and AGM approval deadline, apply specifically to companies rather than sole proprietorships. However, most sole proprietors above the relevant registration thresholds do need to track TDS (if they have employees or make specified payments), VAT (if registered), advance tax installments, the annual return, and local business license renewal, which still covers the majority of the list.
What's the best way to make sure none of these get missed?
Beyond saving the checklist image, setting recurring calendar reminders a few days before each deadline, and working with a Chartered Accountant or bookkeeper who tracks these dates as part of their regular service, are the two most reliable practical safeguards most businesses use to avoid an avoidable missed deadline.
Disclaimer: This article is for general information only and does not constitute legal or tax advice. Specific deadline dates, thresholds, and rules can change, and their application depends on your specific facts and circumstances. Please consult an ICAN-registered Chartered Accountant to confirm the exact deadlines applicable to your business.
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