Monthly VAT Filing in Nigeria: Deadlines, Process, and Penalties (2026)

If your business is VAT-registered in Nigeria, you have a recurring obligation that never takes a holiday: monthly VAT filing. Every single month, by the 21st, you must submit a VAT return to the Nigeria Revenue Service (NRS) — whether you sold ₦100 million worth of goods or absolutely nothing.

This isn't annual like PIT or CIT. It's monthly. Twelve times a year. Miss one, and penalties start stacking. Miss several, and you're looking at a compliance nightmare that costs far more than the tax itself would have.

This guide covers everything about monthly VAT filing in Nigeria: who files, when to file, how to compute the amount, what documents you need, and exactly what happens when you file late.

Who Must File Monthly VAT Returns?

Every VAT-registered business in Nigeria must file monthly returns. You're VAT-registered if:

• Your annual turnover of taxable supplies exceeds ₦25 million in any consecutive 12-month period (mandatory registration), OR
• You voluntarily registered for VAT (even though your turnover is below ₦25M)

Once registered, the monthly filing obligation kicks in immediately. There's no grace period, no "first few months off." Your first return is due the month after your registration becomes effective.

The Deadline: 21st of the Following Month

This is the non-negotiable date burned into every Nigerian VAT-registered business owner's calendar:

If the 21st falls on a weekend or public holiday, the deadline typically extends to the next business day. But don't rely on this — aim to file days before the 21st. As at the time of writing, NRS does not formally publish weekend extensions in advance, so treat the 21st as absolute.

The VAT Calculation: Output Minus Input

The monthly VAT computation is one of the simpler tax calculations in Nigeria. Here's the formula:

Output VAT (7.5% × taxable sales) − Input VAT (VAT on business purchases) = Net VAT payable

What Is Output VAT?

Output VAT is the VAT you charged your customers on taxable supplies during the month. If you sold ₦10,000,000 worth of taxable goods/services, your output VAT is:

7.5% × ₦10,000,000 = ₦750,000

This is the VAT you collected from your customers. It's not your money — it belongs to the government. You're just the collection agent. Think of yourself as holding it in trust until the filing date.

What Is Input VAT?

Input VAT is the VAT you paid on your own business purchases during the month. When you buy supplies, equipment, or services from your own suppliers, they charge you 7.5% VAT. That VAT you paid is your input VAT — and you can claim it as a credit against your output VAT.

If you made ₦3,000,000 in taxable business purchases:

7.5% × ₦3,000,000 = ₦225,000 (your input VAT credit)

Net VAT Payable

Output VAT − Input VAT = what you actually owe NRS:

₦750,000 − ₦225,000 = ₦525,000

That ₦525,000 is what you remit by the 21st. Not the full ₦750,000 you collected — only the net after subtracting what you paid on your own purchases.

Input VAT Under NTA 2025: What's Changed

The NTA 2025 significantly expanded what qualifies as claimable input VAT. Previously, input VAT on certain categories (especially services and some fixed assets) was restricted. Under the current law:

• VAT on services: Fully claimable as input (previously restricted in some interpretations)
• VAT on fixed assets: Fully claimable (equipment, machinery, vehicles used for business, office furniture)
• VAT on rent: Claimable if the property is used for business purposes
• VAT on professional fees: Claimable (legal, accounting, consulting services you purchase)

What You CANNOT Claim as Input VAT

• VAT on purchases for personal use (not business-related)
• VAT on purchases used for making exempt supplies (you can't claim input on goods used to make VAT-exempt products)
• VAT invoices without the supplier's VAT registration number (invalid tax invoice)
• VAT from unregistered suppliers (if they're not VAT-registered, the "VAT" they charged isn't legitimate)

The Filing Process

As at the time of writing, monthly VAT returns are filed through the NRS Rev360 portal. Here's the process:

Option 1: File Directly on Rev360

1. Log into the NRS Rev360 portal with your credentials
2. Navigate to VAT returns section
3. Select the filing period (month and year)
4. Enter your taxable sales, exempt sales, output VAT, input VAT
5. Submit and make payment through the portal's payment channels

Option 2: File Through Taxly

1. Log into Taxly and select "File Taxes" → VAT
2. Select the filing month and year
3. Enter your figures (or let Taxly's accountants compute from your documents)
4. Upload bank statement and invoices
5. Submit — Taxly handles the NRS submission and payment

Documents Needed for Monthly Filing

To file accurately and be audit-ready, prepare these documents each month:

Nil Returns: When You Had No Taxable Sales

Had no taxable sales in a month? Your business was quiet, or all your sales were exempt? You still file. This is called a nil return — a return showing ₦0 in output VAT.

Why? Because the NRS needs to know you're still active and compliant. A missing return looks the same to them whether you had ₦0 in sales or ₦50M that you're trying to hide. Filing a nil return says: "I'm here, I'm compliant, I just didn't make taxable sales this month."

Penalties for Late Filing

The penalty structure for late VAT filing is clear and punitive. Under the NTA 2025:

How Penalties Stack

Let's say you miss your April filing (due May 21) and don't file until August:

• First month late (June): ₦50,000
• Second month (July): ₦25,000
• Third month (August): ₦25,000
• Total penalty for late filing: ₦100,000
• Plus 10% of the VAT owed: If you owed ₦500,000, that's another ₦50,000
• Plus interest: ~27.5% per annum on ₦500,000 for 3 months = ~₦34,375
• Total extra cost: approximately ₦184,375 — for being 3 months late on a ₦500,000 obligation

When Output VAT Is Less Than Input VAT: VAT Credit Position

Sometimes your input VAT exceeds your output VAT. This happens when you made large purchases (with VAT) but had relatively low sales in the same month. For example:

What Happens with VAT Credits?

When your input exceeds output, you have two options under the NTA 2025:

1. Carry forward: Apply the credit against next month's (or future months') VAT liability. This is the most common approach and happens automatically.
2. Apply for refund: Request a cash refund from NRS. This is possible but can be slow — refund processing times vary and NRS may audit your claim before releasing funds. Most businesses prefer to carry forward unless the credit is very large and unlikely to be absorbed in coming months.

You still file a return showing the credit position — NRS needs to see the calculation even when no payment is due.

Monthly Filing Calendar: A Practical System

The businesses that never miss a VAT deadline all have one thing in common: a system. Here's a practical monthly calendar that works:

Common Mistakes in Monthly VAT Filing

Mistake 1: Including Exempt Sales in Your Taxable Figure

If you sell both taxable and exempt goods, only the taxable portion generates output VAT. Including exempt sales (basic food, medicine, educational materials) in your taxable sales figure means you're overcharging your customers VAT on exempt items — and you'd need to either refund them or face issues if audited.

Mistake 2: Not Claiming Input VAT on Fixed Assets

Under the NTA 2025, VAT on business equipment, furniture, vehicles (used for business), and other fixed assets is fully claimable. Many businesses forget to include these in their input VAT calculation — especially for one-off large purchases. If you bought a ₦3M generator and paid ₦225,000 VAT, claim it.

Mistake 3: Filing for the Wrong Period

Make sure your invoices and bank statement match the filing period. If you're filing for April, only include April transactions. An invoice issued in April but paid in May belongs in May's return (because VAT timing is generally based on when the supply occurs or payment is received — check with your accountant for specific situations).

Mistake 4: Using Annual Bank Statement Instead of Monthly

When filing through Taxly or when audited, you need the bank statement for the specific month — not a full year statement. A monthly statement makes verification straightforward; a yearly statement creates unnecessary confusion and delays processing.

Mistake 5: Forgetting to File Nil Returns

We've said it before but it bears repeating: no sales doesn't mean no filing. File a nil return. Every month. Without exception. The penalty for not filing a nil return is the same as not filing a return with actual amounts due.

Mistake 6: Not Keeping Copies of Filed Returns

Always save a copy or screenshot of your submitted return — including the acknowledgment receipt from Rev360. If there's ever a dispute about whether you filed, you'll need proof. "I filed it" without evidence is worthless during an audit.

VAT Filing for Businesses with Mixed Supplies

If your business makes both taxable and exempt supplies, you need to apportion your input VAT:

• Input VAT directly related to taxable supplies: Fully claimable
• Input VAT directly related to exempt supplies: Not claimable at all
• Input VAT on overheads (used for both): Apportioned based on the ratio of taxable to total supplies

What About E-Commerce and Digital Businesses?

The same rules apply to online businesses. If you're selling taxable goods or services online and your turnover exceeds ₦25M, you file monthly VAT just like any brick-and-mortar business. The platform you use (your website, Instagram, a marketplace) doesn't change the obligation.

For digital services provided by non-residents to Nigerian consumers, the NTA 2025 introduced the Significant Economic Presence rules — but that's the non-resident's headache, not yours if you're a Nigerian business.

Using Taxly for Monthly VAT Filing

The biggest challenge with monthly VAT isn't the calculation — it's the consistency. Doing the same thing twelve times a year without missing a beat requires discipline. Taxly is designed to make this painless:

1. Upload your monthly sales invoices, purchase invoices, and bank statement
2. Enter your figures (or let Taxly compute from documents)
3. Submit — Taxly's accountants verify and file with NRS
4. Receive confirmation of filing

No portal navigation. No forgotten deadlines. No "was it the 21st or the 25th?" Just upload, submit, done.

Frequently Asked Questions

Can I file quarterly instead of monthly?

No. Under the NTA 2025, VAT filing is monthly — by the 21st of the following month. There is no quarterly filing option for VAT in Nigeria. Even if your old accountant used to file quarterly, the current legal requirement is monthly.

What if I registered mid-month?

Your first filing covers from your registration effective date to the end of that month. If you registered on March 15, your first return covers March 15-31, and is due by April 21.

Do I need to charge VAT to government agencies?

Yes. Government agencies are supposed to pay VAT on taxable supplies (and actually, they self-account for VAT on payments to contractors). Include government invoices in your output VAT calculation.

What's the difference between this and the guide on "How to File VAT on Taxly"?

This article explains the Nigerian VAT filing obligation generally — the rules, deadlines, computations, and penalties. Our How to File VAT on Taxly guide is a specific walkthrough of Taxly's filing interface — button by button. Read this for understanding, read that for execution.

Can I amend a filed VAT return?

Yes, but the process depends on NRS's current procedures. Generally, you file an amended return for the same period with corrected figures, along with an explanation letter. If the amendment results in additional tax owed, pay the difference with applicable interest. File amendments as soon as you discover the error — don't wait for an audit to find it.

Key Takeaways

• Monthly VAT filing is mandatory for all VAT-registered businesses — no exceptions
• Deadline: 21st of the month following the reporting period (non-negotiable)
• Calculation: Output VAT (7.5% × sales) − Input VAT (VAT on purchases) = Net payable
• Input VAT under NTA 2025 is expanded — claim on services, fixed assets, rent
• Nil returns: file even when you had zero sales — non-filing triggers penalties regardless
• Penalties: ₦50K first month + ₦25K each subsequent + 10% of amount + interest at CBN rate
• When input exceeds output: carry the credit forward or apply for a refund
• Monthly rhythm: invoices by 7th, reconcile by 14th, file by 18th (3-day buffer before deadline)
• Keep copies of every filed return and confirmation receipt — you may need to prove you filed

Related Articles

• VAT Registration in Nigeria: Who Must Register and How
• How to File Monthly VAT Returns on Taxly
• Tax Filing Deadlines Nigeria 2026