A portable voucher is a Housing Choice Voucher the family can use outside the housing authority that issued it. The receiving PHA is the authority in the city where they want to lease. You do not get paid by both. You get paid by the receiving PHA, after it either absorbs the family onto its own program or bills the initial PHA and then pays you.
That split is where first-time buyers lose month one. They treat a port-in like a local voucher, hand over keys, and wait. The file is still moving between two authorities. HAP does not start because the tenant is nice. It starts when the receiving PHA executes the HAP contract.
Run this before you hold the house.
Ask one question on the first call: is this voucher issued by your PHA, or is the family porting in? If they are porting, stop the tour script. You need the receiving PHA named, the caseworker email, and whether that PHA will absorb or bill. Absorption means the receiving PHA takes the family onto its own funding. Billing means the receiving PHA still runs the lease and pays you, then invoices the initial PHA. Either way, your check comes from the receiving side. You do not chase the city they left.
Put the unit on a short hold only. Tell the family and your realtor the same line: no lease start, no keys, until the receiving PHA confirms it will process the Request for Tenancy Approval. The RFTA is the packet the owner submits so the PHA can approve that unit for that family. A port-in RFTA goes to the receiving PHA, not the authority that printed the voucher.
Send one email. Copy the caseworker. Ask three things in plain language. Will you absorb or bill? What is the voucher expiration date on the receiving side? What date will the HAP contract start if the unit is approved? Save the reply. That email is your file. You are not in the room. The reply is.
Do not match your lease start to the day the family wants to move. Match it to the HAP effective date they put in writing. If they will not date it, the house stays vacant. A vacant week is cheaper than a full month you cannot invoice. The tenant portion is a separate number on the lease. Collect that from the family on your start date. Do not net it against HAP you have not been awarded.
If the receiving PHA is billing, expect the first owner payment to lag the paperwork between the two authorities. That lag is not your tenant's fault, and it is not a reason to skip rent. Your realtor does the key handoff and the lease walkthrough on the date you approve. Your contractor is on standby for the make-ready only. You own the email, the start date, and the decision to wait.
Payment standards in the new city can differ from the city that issued the voucher. Underwrite the rent to the receiving PHA's standard and utility allowance, not the number the family quotes from back home. If the rent does not clear rent reasonableness there, the port dies on your door and you have burned days.
The kill shot is simple. No written HAP start date from the receiving PHA, no keys. A portable family can be a clean tenant. An unconfirmed port is an unpaid month.
Actionable Takeaway: Email the receiving PHA today and ask, in one thread, whether this family is a port-in, whether they will absorb or bill, and the HAP contract start date they will put in writing before you release keys.