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Question

Sub Contract Certificate and Invoicing - Shortfall in functionality? Tax and Payment Terms

  • October 8, 2025
  • 1 reply
  • 37 views

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Hi All - some observations and questions on sub contract certificate invoice matching.

 

1.VAT

When a sub contract valuation is created, the tax code information will be taken from the tax code on the revision item. When an invoice is received from the subbie and created in IFS, it is connected to the sub contract header but does not inherit the tax code from the contract, it comes from the invoice tab on the supplier.

When the invoice line is matched to the certificate line, the posting lines take the tax code from the invoice and not from the valuation line. 

Is there something we can do to prevent this happening? It seems counter intuitive to be able to enter tax information on lines but they have no impact when it comes to the invoice creation and posting process.

 

2.Payment terms

Sub contract valuations will often have user defined payment dates, independent of calculated dates.

As before, it would make sense if the invoice automatically updated the due date when matched to a certificate. Instead, the payment terms are taken from defaults.

 

Does anyone know of any set up changes that can be made to prevent these two things happening?

 

Thank you,

 

Stephen

1 reply

BGPROBYOUNG
Do Gooder (Customer)
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  • Do Gooder (Customer)
  • January 9, 2026

Hi.

 

We see this and make use of the fact that the invoice should be correct, The challenge is how that then reflects back to the subcontract.  Strangely having tax on the subcontract items causes more issues than it solves for us.  Do you make use of the Self Billing so you create your own invoice?

 

On Payment terms, yes have add fields for application dates, due dates etc. It doesn’t really affect the invoice.

 

Rob