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Changing the ABN

IanChait

AccountRight

Business is restructuring and will have a new ABN from 1/7/25.

Will the business be able to process payroll in the new year but not report for STP, then when 2025 is finalised, change the ABN, re-register for STP and report the unreported payruns?

Thanks

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Accepted answers

Earl_HD

Hi @IanChait,

Yep, you can start processing payroll under the new ABN from 1 July 2025 without jumping into STP reporting right away, but there’s a little checklist to follow first! Make sure you’ve wrapped up and finalized all STP reporting for 2024/25 with the ATO.

In the meantime, check out these super handy links — they break it down really well:

ABN Changed – STP Reporting Issue
Changing ABN – What Happens to STP?
How to Update Your ABN for STP in MYOB

Regards,
Earl

All comments

Le_Trinh

MYOB Support is still working on it and I don't know how long it's going to take, but I'm stressed out so much

Genreve_S

Hi @Le_Trinh,

Thank you for the screenshot and additional information. In your concern, it's best to have real-time responses with the support team. This way, they could walk you through the steps for your ABN change and check on potential issues with the processes you went through.

I recommend reaching out to MOCA, our virtual assistant, to get connected with our live chat team.

Regards,
Genreve

Le_Trinh

Hi @Genreve_S

I've tried to remove the ETP amount under the new ABN but nothing worked.

I zero'd out the ETP amount on YTD drop down on Pay History on the employee's card: it didn't work
I reversed out the original ETP pay dated 06/11/2025 under the new ABN ( whereas the original ETP pay was recorded 25/09/2025 under the old ABN): it didn't work

Also while I have you here can you confirm that this is where I need to change the branch ID number: In STP-> ATO setting? I've attached the screenshots of ATO setting on MYOB STP and ATO Business portal

Screenshot 2025-11-20 113127 GST Branch.png

Genreve_S

Hi @Le_Trinh,

Thanks for the update, sounds like you’ve been at this for a while.

On the ETP duplicate, it’s usually because the employee still has a non‑zero ETP/YTD under the new ABN. Suppose the old ABN’s figures are already correct and tax‑ready. In that case, you don’t need to switch back, just make sure that the employee’s YTD/ETP is $0 under the new ABN, don’t finalise them there, and send an Update event (or run a $0 pay) so the ATO refreshes that employee to zero on the new ABN. Only jump back to the old ABN if you actually need to fix or re‑finalise something on the old ABN.

On the branch number, I would treat it the same way as the change in the ABN number process. If you have anything recorded against the branch 1, zero out the pay history, then finalize. Then switch to the correct ABN branch, then re-input the pay history so it would be included on the correct branch number.

Regards,

Genreve

Le_Trinh

Hi @Princess_R @Shella_A @Earl_HD,

Our ABNs changed on 31/10/2025 as on my above message ( same company file, same software). I followed your instructions above and it worked for all employees except for an ETP amount for one employee who terminated on 25/09/2025 ( before the SBR). This ETP amount is showing on both income statements for the new ABN and old ABN. I tried reversing out the original ETP pay but dated in 6/11/2025 rather than the original date 25/09/2025, it didn't work, the ETP amount is still showing on the income statement under the new ABN of the employee while the other pay categories are showing 0 as they should be.

Now adding to my unsolved tangle, I've just found that under the new ABN, the GST branch number in MYOB is 001, and the branch ID on the ATO business portal is 002. The first pay for the new ABN was processed and reported to the ATO on 06/11/2025 under the combination of new ABN + branch 001, I can see this pay on STP on the ATP portal even though then branch ID listed on the portal is 002. The ATO haven't gotten me for this yet but I think they will. How do I fix it? I'm scared that if I zero out the YTD for the combination of new ABN + Branch 001 and finalise it, then change to branch 002, update YTD for the new ABN + Branch 002, the ETP will be also showing on the income statement of new ABN + Branch 002, hence triple reporting

Could you please help me with clear step by step instructions to fix this?

Also I'm trying to understand how things work for STP reporting, can you please help with these queries:

- Please confirm when ABNs change in the same company file, same payroll software , then the BMS ID and employee Payroll IDs remain the same for STP reporting?

- If I change Branch ID in the same company file, same software, then the BMS ID and employee Payroll IDs remain the same for STP reporting?

-If the 2 above points are correct, If I change the Branch ID, I will need to zero out YTD figures for the combination of new ABN + branch 001, finalise it including the employee with the ETP issue. And then change the branch ID to 002, untick the finalisation, change YTD figures to reflect payroll for the combination of new ABN + branch 002, then run $0 for each active employee to update the ATO rather than send an update event, would this way exclude the already terminated employee with the ETP issue from being reported and finalised under the combination of the new ABN + branch 002, and in the end of FY, as this employee is still showing the list for finalisation, can I just not tick this employee for finalisation for the new ABN + branch 002?

I hope someone can help me out soon

Shella_A

Hi @Le_Trinh,

Yep, all good! That’ll work. Just make sure the next pay run dated 31/10/2025 is under the new ABN. Finalise payroll under the old ABN, then switch to the new one and create the 31/10/2025 pay run there to keep things neat and tidy with the ATO. If you need further help processing that, you can reach out to our team via our virtual assistant MOCA or pop a support ticket through My Account. We’ll guide you through it.

Cheers,

Shella

Le_Trinh

Thanks @Princess_R

Just one more question if you don't mind: Our last payrun for Oct will be on 23/10/2025, the ABN will be changed on 31/10/2025, would it be ok to finalse payroll for employees under the old ABN and send the finalisation to the ATO on 31/10/2025 before changing the ABN to the new ABN also happening on 31/10/2025?

Le_Trinh

Hi @Earl_HD

I've happened to see your response and was wondering if you could help as we're changing ABN as well

Our entity is restructuring and a new ABN will be used starting 31/10/2025, I want to keep using the same company file, so I imagine the period from 01/07/25- 31/10/2025, payroll will be under the old ABN, and from 1/11/2025 payroll will be under the new ABN.

My concern is: I was told that a company file has its own software ID# linked with its ABN to report to the ATO. So if we change the ABN to a new ABN on the same company file, would I be able to report payroll from 1/11/2025 under the new ABN with the same software ID#? would I be able to register for STP under the new ABN using the same company file and ID#?

Thanks,

IanChait

Thanks Earl

Earl_HD

In the meantime, check out these super handy links — they break it down really well:

ABN Changed – STP Reporting Issue
Changing ABN – What Happens to STP?
How to Update Your ABN for STP in MYOB

Regards,
Earl