Many years ago my former HP gave me a useful and evocative spell for wealth.
Herewith:
The Mammon Cup Spell
Get a cup that means "wealth" to you. The cup I ended up with was a cobalt glass goblet.
Find a coin that is "different" in that you can separate it from the others. A half dollar or a foreign coin works well.
Empower the cup and coin in the name of Mammon. Mammon is an ancient Babylonian deity of wealth trade and commerce. Interestingly, Mammon now means "evil" and "all that wealth/physical stuff" to many modern day Christians and Jehovah's Witnesses. Here we intend to deal with the original aspect of the god.
At the end of every day, take any loose change from your pocket and put in in the cup. At the end of a moon cycle (you can attune your cup to either Full or New moon depending on your preference) give all the coins in the cup away, with the exception of your special coin. Give that wealth to the first person who comes along needing it, no matter how you personally feel about that (the drunk on the street is as worthy as someone trying to pay their rent) and empower it with the idea that what you put out comes back to you. Do not expect or accept thanks. Remember that they are doing YOU a favor by taking this wealth, and allowing it to return to you three or tenfold.
Why it doesn't work for me personally:
As a Celtic witch, I just cannot get "with" the idea of Mammon, no matter how worthy or not that being might be.
I don't use paper money any more. On the rare occasion I actually make it to town, I use plastic money. That means no change in my pocket to put in the cup.
At this point in my life, I have come to see wealth as having enough food on the table for my family (including my many critters). The bounty of my garden is also my most accessible form of wealth.
The Dagda (pronounced Day-da) or the Good God is the Celtic deity who represents wealth, fertility and bounty. He is associated with the cauldron (his could never be emptied) and the fork (which represented food/eating, the plow and also his enormous member).
The Dagda's Basket
Acquire or make a good-sized basket, preferably of natural materials. You can also use a cauldron (if you have access to one) or a stock-pot, however I prefer the basket because it will be lighter in weight. Decorate the basket with symbols of wealth. Some ideas are suns, green and/or gold ribbons, clusters of wheat, acorns or corn, or beads and stones such as amber, tiger's eye, malachite or green tourmaline.
Also acquire a large fork. I suggest a wooden salad fork. Paint or carve the fork with symbols of wealth. The Fehu rune or the Gar rune (from the Younger Futhark) work well, as would dollar symbols, suns, spirals, lemniscates or whatever symbols have meaning to you. Bind the fork to the basket.
Empower the entire assembly to bring prosperity to those you gift and to return that prosperity to you tenfold, in whatever manner the Gods see fit. I recommend doing your spell at noon at the first crescent or full moon.
At least once per month (or any time you have a good harvest) fill your basket with the bounty of your garden. If you make preserves, pickles or other items, you can also fill your basket with those items as you make them. Naturally, with fresh veggies and fruits, you'll want to do your give-away while the items are still fresh. For non-gardeners, or during winter months you can also purchase canned food from your local grocery and give that away once your basket is full.
Bring your basket into town. Be sure to bring a shopping bag or two as you don't want to give away the basket itself. Give the contents of the basket away to the first person you see who looks hungry. Do not expect or accept thanks, just pass it off as "no biggie," and empower that exchange to return the wealth to you tenfold. If you don't see anyone who looks like they could use food, bring the contents to a soup kitchen, food pantry or church.
May you be blessed with prosperity, joy and health!