What is the significance of pennies over a doorway?

While looking for an answer to your question I found this fascinating article and I also found a link you may find useful.I hope this helps answer your question.

A Game with the Ghosts

We called this contract — this ritual, this spell, this game, really — a penny charm (in that obvious, childlike manner with which such things tend to be named).

The basic gist of a penny charm is that, before you move any of your belongings into the home, you greet the spirits who dwell there, you introduce yourself, explain who you are, how you intend to share the space, how you wish to interact with them, ask for their blessing, and invite them to provide security for you and yours.

If the spirits accept you as a new member of the family and agree to let you reside in their house, they will leave a coin (or coins) on the floor. The coin — usually a penny — will appear close to a door or window (sometimes, it may appear on the actual window sill).

You should express your thanks to the spirits and place the penny on the top of the closest door- or window-frame. (The trim around a standard door or window will comfortably hold a small coin, disguising it from view.)

The protection is not literal; it’s not only active on a particular door as a physical lock or deadbolt might be; all physical and non-physical pathways into and through the space should be “covered.” I have observed that the penny’s placement might have something to do with energetic or spiritual — more than physical — portals. If you do find multiple coins as a result of the spell, just place them individually, according to the best/closest corresponding door or window.

Or spread them around the house. It’s your ritual — follow your instincts.

The penny acts as a symbolic charm of protection — the coin itself has no power; it represents the signed contract that the spirits have agreed to provide protection, to the best of their abilities, in the dimensions which they can affect.

Fully expect the penny to (eventually) vanish.

(Shortly after placing it above a door or window, you may remember the charm and check to see if it’s still there. At some point, you will forget about it… this is when it ultimately disappears. Then again, months or even years later, the coin may still be there. Who knows? Both situations have happened to me.)

What if you’ve already been living in your home for some length of time — can you still do this spell? I’ve moved around a lot, always as a renter, so I’ve had plenty of opportunities to do this from Day One. I don’t see any reason why you can’t or shouldn’t perform this spell right now if you wish.

A couple of things I would advise — if it ain’t broke, don’t worry about fixing it. I also can’t help but wonder how many of you, if you go feeling around the tops of your doors and windows, might discover these kinds of coins or talismans already in place. If you find something there, and you’re not experiencing “negative haunting issues,” I’d assume the charm is still active — leave it alone or put it back.

If it makes you feel better, before returning a found coin that you suspect is already an active charm, you could always ask the spirits to amend the contract to include you.

Go ahead and check; I’ll wait right here.

…Then I’ll tell you what I found around the doors and on the floors of the Daniel House…

http://sladeroberson.com/hauntings/waking-ghosts-p...

http://www.pennypriestess.org/pennyfaq2.htm

1

Itallian folklore probably - it's so that money will flow freely into the home and that the people inside prosper.

It's a good luck thing. Some people also put coins on the windowsills (inside or out, doesn't matter), or bury a quarter in the front yard by the walkway.

Was on Y Answers for something unrelated, but this topic was trending on the sidebar...

Some superstition about garnering good luck.