The key to making extension payments online with the Illinois Department of Revenue is that — for non-business payments — there is no registration or login needed. In fact, you should make sure NOT to log in using the business credentials you might otherwise use for sales taxes or business income taxes.

Instead, simply go to MyTax Illinois, do NOT sign in, and click the button that says “Make an Individual Income Tax payment”. (See screen shot above.)

It will walk you through the Non-Login Payment screens, starting with the following:

Make sure to enter your SSN (not your business EIN), and then click the “Look up my IL-PIN” blue link to the right of the field. It will take you to a verification screen:

When you re-enter your SSN here and select one of the options, it only takes a few moments for the system to return a PIN number that you should copy and enter onto the previous screen. (Pro tip: if you’re using Adjusted Gross Income, use Line 1 from your most recently-filed Illinois tax return — it’s easier to find than AGI from your Federal return, and that way you know it will match Illinois’ records.)

On the next screen, enter the payment type:

In this case, since you’re filing an extension, you want the “IL-505-I Payment”.

(The other options are for quarterly estimated tax payments — IL-1040 Estimated Payment — or for a balance-due with your actual annual state income tax return — IL-1040 Payment. Since this is for an extension, you’ll pick the final one.)

Then you’ll select the tax year for the extension:

Lastly, you’ll enter bank information, payment amount, and date of payment.

Click “Submit” and PRINT/SAVE A COPY OF THE CONFIRMATION PAGE. I know they’ll email this to you, but every once-in-a-while something goes wrong, and it’s good to have proof that you attempted paying on-time.

While you’re at it, send a copy of that confirmation page to your dedicated accountant!

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