As noted there are tow ways you can calculate interest on subject accounts/general ledger using PANTHEON. 

It is more correct to make use of the first method where interest are calculated only after the document has been closed.

1. Interest Calculation by Documents

It is better calculating interest using this method!

An essential feature of interest calculation by documents lies in the fact that interest get calculated ONLY AFTER the document payment has been covered completely.

Calculation is performed based on individual linked document thus any partial payments, that is, all changes of the principal occurring within interest-bearing period are considered in calculation. Interest on document are calculated from due date (excluding first due date) to date of payment.

2. Interest Calculation by Payments

Such method of calculating interest helps check interest calculations issued by any subject using this same method!

An essential feature of interest calculation by payments lies in the fact that you can calculate interest on document when it is at least partially settled.

Unlike interest calculation by documents you calculate interest on individual payments and not on the current amount of principal as recorded in the document. That is why we do cannot get the same results as by using interest calculation by documents.

Calculation is performed based on individual linked document. 

Interest on payment is calculated from document due date (excluding the first day) till the date of payment.

Example:

Document 07300000005 was settled in three partial amounts as can be observed below:

1. Interest Calculation by Documents

Let us first use a more suitable and more correct method used for calculating interest. That is, calculating by documents, or more precisely for documents which were paid or completely closed in the period from March 1st, 2007 to March 31st, 2007.

Interest are calculated to the first partial payment on the original principal of €3200. On 22.02.01) se glavnica zniža za znesek odplačanega dolga.

2. Interest Calculation by Payments

Prikažimo še primerjalni obračun po plačilih,  to je torej za plačila, sprejeta od 01.01.01 do 30.05.01.

Obrestuje se torej plačilo: od dneva zapadlosti glavnice do dneva plačila. 

Če bi bila faktura s tem v celoti plačana, se obračuna med seboj ne bi razlikovala (glej primer v poglavjih Obračun - dokument in Obračun - plačila, kjer obravnavamo isti primer).

Če gre za delno plačilo, pa se tako izračunane obresti razlikujejo. Razlika seveda raste z glavnico (neplačani preostanek) in številom dni obrestovanja (število dni do naslednjega plačila).