Tax Declaration for IBKR Cash and Interest

[larix.aurea]

@Asheen

Should I just use the account number of my IBKR account where I’m supposed to enter the IBAN of my account in the tax form?

That’s how I have been doing it for years now. Not an issue.

[Pet]

@Asheen Have you tried opensteuerauszug already? With that tooling, you would not have to care about IBRK IBAN and other manual entry of data.

OpenSteuerAuszug: generate your own eTax / eSteuerauszug for IBKR, Schwab and others

This thread got extracted out of Programmatic Tax Return. It can be used for discussion and also support if needed. If possible, issues should be reported at GitHub.

[Asheen]

Hi everyone

I guess I need to declare the cash I have on my newly opened Interactive Brokers account (not invested yet). (This is also the account where dividends end up.)
This account needs to be declared as any other bank account, right ? However, it doesn’t seem to have an IBAN. should I enter the account number instead of the IBAN?

(I’m in GE if that matters)

Thanks a lot for your help.

Best,

-a-

[PhilMongoose]

Just put my IBKR account number and currency e.g.

U123423-CHF
U123423-USD
U123423-EUR

[Luk_nuts]

@Asheen

the cash I have on my newly opened Interactive Brokers account

Did you already have the account on Dec 31st?
If no: You’ll need to declare it for this years tax declaration (in 2027).

[Bojack]

@PhilMongoose

Just put my IBKR account number

Actually, I’m not sure if putting the IBKR account number in your tax declaration is such a good idea. Probably not bad, but unnecessary. Just write Interactive Brokers USD, Interactive Brokers CHF, etc…

I also have a payroll account at the company I work for, and I just put the company name as account name.

@Luk_nuts

You should have an IBAN, as usually that one is needed to send money to IBKR.

This is wrong. That account number that you use to send money to IBKR is not your personal IBAN. Plus, what if you exchange currencies?

IMO it does not matter to have some real unique identifier for an account. Just describe what it is. If they don’t like that description, they will send you an email with a question.

[nabalzbhf]

@Bojack

IMO it does not matter to have some real unique identifier for an account.

Might be easier for them when they reconcile with the AEOI data they get.

[justbob]

I don’t even split it out by currency, just interactive brokers and then use the summary CHF, as the reporting has both ending cashin CHF and a CHF number for total interest/debt payments. (Assuming you use CHF as account currency)

[dipstinger]

I doubt they even care about account numbers, just more important that it’s declared as an account. You could even send a pdf ibkr statement (it’s not a swiss tax statement but they will know how to read it). I’m in GE and that’s what I do.

[Bojack]

@justbob

I don’t even split it out by currency, just interactive brokers and then use the summary CHF

If you’re holding pocket change, then it does not matter. Eg. I hold an equivalent of few hundred CHF in Revolut in many different currencies and I don’t even declare it. But if you’re holding like 100k in USD and then the exchange rate goes from 1 USD = 1 CHF to 1 USD = 0.5 CHF then suddenly you’re reporting 50k CHF and they might ask where has the money gone. I mean, it will still probably be fine if you provide them with explanations, but I’m just trying to point out the advantage of reporting what you exactly hold, and not converted. You wouldn’t convert your shares into CHF either.

[Asheen]

Yes I opened it Sept 1st 2025.

The IBAN used to send money to IB is a generic one AFAIU. When you send them money, you need to mention the name of the receiver (myself) so they put your money on the corresponding account.

[Asheen]

Thanks a lot! Can you tell me what pdf document you join to your tax form? I cannot figure out what is relevant.

EDIT: I believe I found it. I guess I should use the report named “previous calendar year” (detailed PDF file) in PortfolioAnalyst / Reports, right?