In Jainism there is no sanctioned “money mantra” that guarantees wealth. Wealth is seen as a result of one’s karma and one's ethical conduct, not something to be gained by chanting a specific formule. The spiritual path focuses on right faith, right knowledge, and right conduct, plus charity and detachment.

What you can use instead:

• Navkar Mantra (Namokar Mantra): This is the foundational prayer to purify the mind and align actions with dharma. It is not a wealth-specific chant, but it helps cultivate inner clarity and right conduct. You can read more about its meaning and practice here.
• If you are drawn to devotional stotras, Bhaktamar is a well-known Jain hymn; some verses touch on prosperity in a devotional context, but its aim is spiritual progress, not guaranteed material gain. You can learn about its significance here.
• Practical guidance aligned with Jain ethics:

- Earn and use wealth with satya (truth) and ahiṃsā (non-violence). - Practice aparigraha (non-attachment) and contentment. - Give charity and support welfare through ethical means.

Notes on tradition (Digambar vs. Śvetāmbara):

• The core guidance above applies across both traditions. There isn’t a separate, universally accepted “money-mantra” in either tradition; the emphasis remains on purification, right conduct, and responsible use of wealth.

You can read more about the general view on wealth and Jain ethics here.