Do not open banking in Malta (fellow German with an IT holding here) but simply use continental european banking. Transferwise, Revolut etc all got business accounts, bunq got fully insured private ones. Stash cash away in treasuries, ETFs whatever over direct buying or broker like IB etc.
And yes you are right Malta is very good for the Finanzamt since you get proper tax certificates, paying 35% etc pp. This is very important actually which most people do not realize.
Also i think judging from your other post you misunderstand how the refunds work, you dont pay corp tax right away and then wait 2 years to claim your refund. You claim that when you pay pretty much right away. Depending on your tax dates, how / when you pay dividends etc that will usually be like file september year after so after 18 months, pay in june next year and file right away and by law get it within 14 days after filing the refund. It will usually take a few months though (which generate you interest on late payment on behalf of the gov)
So e.g.
2018 -> tax return filing 10/31/2019, tax payment 06/30/2020, refund 06/30/2020, officially within 14 days of payment so 07/14/2020 refund. Late payments of refund = interest.
You can operate with that money for quite some time (but do make sure to have it one time!!! to not jeopardize your refund!!!) and usually will see the 30% gone only for weeks to months.
And yes you are right Malta is very good for the Finanzamt since you get proper tax certificates, paying 35% etc pp. This is very important actually which most people do not realize.
Also i think judging from your other post you misunderstand how the refunds work, you dont pay corp tax right away and then wait 2 years to claim your refund. You claim that when you pay pretty much right away. Depending on your tax dates, how / when you pay dividends etc that will usually be like file september year after so after 18 months, pay in june next year and file right away and by law get it within 14 days after filing the refund. It will usually take a few months though (which generate you interest on late payment on behalf of the gov)
So e.g.
2018 -> tax return filing 10/31/2019, tax payment 06/30/2020, refund 06/30/2020, officially within 14 days of payment so 07/14/2020 refund. Late payments of refund = interest.
You can operate with that money for quite some time (but do make sure to have it one time!!! to not jeopardize your refund!!!) and usually will see the 30% gone only for weeks to months.