Money cost for designing spells

[francesco serafini]

Anyone knows if there are any rules about the money cost of designing new spells?
The ultimate magic rulebook gives only general tips.
Maybe somewhere I can find house rules from which take inspiration...

In the old versions of D&D I used to paid for new spells, maybe there weren't any official rules in the 2.5 edition too...

[Dave Justus]

The research should cost at least 1,000 gp per spell level

Researching Spells

[francesco serafini]

Thank you for your help.