It is never too early for a child to experience the reality of finances - indeed, the sooner they experience this very real aspect of most modern cultures, the more comfortable they are maintaining their value systems with it and the more likely they are to be creative throughout life in various economic situations.
Montessori does not specifically address "here is an album page about personal finances" - what DO we have in primary Montessori and elementary Montessori?
- decimal fractions - with extensions to include local currency
- language nomenclature - on monetary units
- economic geography - studying the trades and interactions of current times (can be extended to historical and imaginative cultures as well)
- story problems/word problems using money and goods exchanges
- Goings Out - using real money and real exchanges in real every-day life. Planning purchases, planning errands, looking at gas prices and driving routes, reality of putting too many miles on the car needlessly, shopping around for the best balance of price and quality for services needed or desired, etc. Just living real life - and involving all family members.