OCTMO code for tax deduction in 3-NDFL: where to get and how to specify correctly in

Filing a declaration 3-NDFL to obtain a tax deduction - a procedure that requires accuracy to the smallest detail. One of the key points where many people make mistakes is the code. OCTMO (All-Russian Classification of Municipal Territories). This code identifies your municipality and directly affects the processing of the FTS declaration. A single-digit error can result in a deduction denial or a delay in refunds for months.

In 2026, the rules for filling 3-NDFL There have been no revolutionary changes, but the relevance of the codes. OCTMO The municipalities are checked annually - they can be merged, renamed or changed borders. In this article, we will discuss where to get the correct code, how to check it, and what to do if your municipality is not in the standard directories of the Federal Tax Service. We also answer frequent questions: is a code necessary when submitting a declaration through the Personal Account of the TaxpayerCan you use the old one? Okata instead OCTMOHow to correct the error if the declaration has already been sent.

What is OCTMO and why it is important for 3-NDFL

OCTMO The All-Russian Classifier of Municipal Territories is an eight- or eleven-digit code assigned to each municipality in Russia. It replaced the old one. Okata In 2014, many people still confuse these categories. V 3-NDFL code OCTMO indicated in the section "Information on the Declarant" and is used by the tax service to:

• 📍 Identifications Your place of residence (or the location of property, if we are talking about deduction for real estate).
• 💰 Distributions tax revenues between budgets of different levels (federal, regional, local).
• ⚖️ Control for the correctness of filling in the declaration - the discrepancy of the code to the actual address may cause a refusal to deduct.

It is important to understand that the code OCTMO does not match the postal code or the IFNS code. For example, for Moscow and St. Petersburg codes begin with 45 and 40 They can vary greatly within regions, even for neighbouring areas. If you are applying for a deduction for treatment, education or housing purchase, the code must correspond to the place of your registration (according to your passport), and not the location of the clinic or educational institution.

Where to get the current code of OKTMO for 3-NDFL in 2026

Find the right code OCTMO There are a number of ways. We recommend using official sources to avoid mistakes. Here are the proven methods:

1. Website of FNS of Russia - the safest option. Go to the page. "Get to know OKTMO" and enter your address. The system will automatically select the current code. Please note: if you have multiple registration locations (e.g. temporary and permanent), select the code by permanent.
2. OCTMO Handbook portal public services website rosstat. These resources are updated less often than the service of the Federal Tax Service, but can be useful if you have a non-standard address (for example, a city-type settlement or a closed administrative-territorial entity).
3. Tax Inspectorate by telephone. Call your IFNS (the number can be found on the FNS website) and specify the code, naming your exact address. This method is suitable if online services give conflicting data.

If you live in new neighborhood or cottageIf you have not yet been listed in the classifier, please contact your local administration for clarification. In some cases, the FTS temporarily accepts declarations with a code. OCTMO higher level (for example, the area code instead of the village code).

How to check the OCTMO code before submitting 3-NDFL

Code error OCTMO One of the most common reasons for suspending cameral checks of declarations. To avoid problems, do this. double-check:

Pay special attention to the following nuances:

• 🏠 For deduction for home purchase code OCTMO It should be the location of the property, not your residence permit. For example, if you bought an apartment in Sochi, but registered in Moscow, specify the code of Sochi.
• 🎓 For tuition deduction Your code (or your children) is taken at the place of your registration, even if the school is located in another city.
• 🏥 For deduction for treatment (including expensive) the code is also linked to your registration address, not the location of the clinic.

If you submit a declaration through Personal Account of the TaxpayerThe system can automatically insert the code. OCTMO from your profile. Don't rely on autocomplete! In 2023, there were cases when the system substituted outdated codes for some regions (for example, after the merger of municipalities in the Moscow region). Always double-check the data manually.

What if the OCTMO code is not found?

If your address is not determined in the services of the FTS, try:

1. Specify a higher level code (for example, a city code instead of a district code).

2. Contact the tax office with a written request for clarification.

3. A temporary solution is to use the code from the previous declaration (if it was adopted without comment), but this is risky if changes in the classifier are made.

Examples of OKTMO codes for popular cities (2026)

Below is an updated list of codes. OCTMO for the major cities of Russia. Please note: the codes may differ for different areas within the city (for example, in Moscow for each district its own code). Use official services for accuracy.

Town	OCTMO (main) code	Notes
Moscow	45383000	For intra-city municipalities (districts) codes begin with 453For example, 45303000 - Khamovniki district.
St. Petersburg	40379000	For areas, codes vary from 40301000 (Admiralty) before 40325000 (Seaside)
ekaterinburg	65701000	Common code for the city. For urban areas, use the specified codes (for example, 65701037 - Upper Iset district.
Novosibirsk	50701000	Area codes start with 50701For example, 50701010 - The railway area.
Kazan	92701000	For areas, use type codes 92701010 (Aircraft construction) or 92701020 (Wachitovsky).

Attention! Codes for But (Closed administrative-territorial entities), such as zheleznogorsk (Krasnoyarsk region) or sarov (Nizhny Novgorod region) may differ from the standard. For these territories, check the codes at the local tax office.

Errors with OCTMO in 3-NDFL: how to fix and what will happen if not corrected

If you have already filed a declaration with the wrong code OCTMODon’t panic, the situation can be corrected. The consequences of the error depend on the stage of processing the declaration:

• 📄 Declaration not yet adopted (Received or Inspected status): You can revoke it through Personal office And re-submit with the correct code. The time for the check will start again.
• ⏳ Declaration at the desk inspectionIf the FTS finds an error, you will be sent a request for clarification (by mail or in the mail). Personal office). You will have 5 working days to respond.
• ❌ Declaration rejectedIn this case, you need to submit an updated declaration with the correct code. The tax refund period will be shifted by 2-4 months.

To correct the mistake:

1. Download. refined declaration (Same format: 3-NDFL) and fill it out again, specifying the correct code OCTMO.
2. In the field "Adjustment number" specify «1—» (if this is the first edit).
3. Attach an explanatory note indicating the reason for the correction (for example: “Octmo code from XXXXXXX to UUUUUU due to error”).
4. Repeat the declaration through Personal office Or in person at the IFNS.

In the most difficult cases (for example, if the code is OCTMO changes due to the reorganisation of the municipality, may be required letter-of-service about the correctness of the code. These situations are rare, but it is better to be prepared.

Frequent questions about the OCTMO code in 3-NDFL

🔍 Can I use the old Okato code instead of the Octmo code?

Since 2014, only the declarations have been OCTMO. Code. Okata It's obsolete and unused. If you point out OkataThe declaration will be returned for revision.

📌 Do I need to specify OKTMO when submitting 3-NDFL through my Personal Account?

Yes, even in electronic form, code. OCTMO It's mandatory. The system can substitute it automatically, but you have to check the correctness. In 2023, there were instances where autocomplete provided codes for neighbouring municipalities (e.g., for the purpose of the autocomplete). Balashikhi instead rutova).

🏢 What code should I use if I have a temporary registration?

For tax deductions (except for housing deduction) the code permanent. Temporary registration is only taken into account if you submit a declaration at the place of stay (for example, when renting out real estate).

⏱ How much time is allowed to correct the error in the OCTMO?

If the FSA asks for clarification, you have 5 working days answer. If you do not have time, the declaration will have to be filed again, and the tax refund period will shift.

💸 Can an error in OCTMO lead to a denial of deduction?

Yes, if the code doesn't match your municipality. For example, if you have provided a code Moscowand are prescribed in Moscow regionThe FNS will reject the declaration. Minor errors (e.g., one incorrect digit in the district code) can be corrected at the request of the IRS without serious consequences.

Conclusion: algorithm of actions for error-free filling

To avoid code problems OCTMO into 3-NDFLFollow this algorithm:

1. Please specify the address of registration In the passport, it determines the desired code.
2. Check the code on the FNS website at the current address. Do not use old directories or data from the Internet without confirmation.
3. Contrast the code with the deduction type:
   • For deduction (Housing) - the code for the location of the property.
   • For social deductions (Treatment, training) – the code at the place of your registration.

File a declaration and keep the confirmation (registration number in the Personal office.).

Status tracking. declarations. If there is a requirement for clarification, react quickly.

Remember: OCTMO code does not affect the amount of deduction, but its error can delay the refund of taxes by 3-6 months. If you doubt the code, it is better to spend 10 minutes calling the IRS than then correct the consequences.