Posted about this after Build, but it appears there's good news and bad news here. Good news: it appears Microsoft has a solution, but the bad news is that it'll require Host Card Emulation, which means only newer devices will support it:
http://forums.windowscentral.com/windows-10-mobile/354612-host-card-emulation-nfc-payments-newer-devices-only.html
http://forums.windowscentral.com/windows-10-mobile/354612-host-card-emulation-nfc-payments-newer-devices-only.html