Honestly, this is one of the most misunderstood things in PPF planning and your CA is pointing you in the right direction — but the details matter a lot.
First, yes — joint PPF accounts are NOT allowed in India. PPF is always individual. So you can't have a joint account with your wife. But you CAN open a separate PPF account in her name. That's completely legal and lakhs of families do this.
Now the important part — the ₹1.5L limit. Here's where people get confused. Each person has their own ₹1.5L annual deposit limit. So your wife's PPF account can receive up to ₹1.5L per year separately. BUT — and this is the catch most people miss — the 80C deduction of ₹1.5L is per taxpayer, not per account. Since your wife has no income and doesn't file ITR, she can't claim 80C herself. You can claim 80C on deposits made into your wife's PPF only if she's treated as a dependent — but the combined limit across your account and hers is still ₹1.5L for you.
So no, you don't magically get ₹3L of 80C benefit. That's a myth.
However — and this is the real benefit — the interest earned in her PPF account is tax-free, and since you're gifting money to your wife, clubbing provisions under Section 64 apply to the interest. But PPF interest is already exempt under Section 10(11), so clubbing doesn't really hurt you here. The money grows tax-free regardless.
For gifting money to her account — no gift tax issue between spouses in India. Gifts between husband and wife are exempt. Just transfer via bank, keep a record.
Practical steps: Open her PPF at Post Office or any nationalized bank like PNB, Bank of Baroda, or SBI. Post Office is honestly the most hassle-free for homemakers. Minimum deposit is ₹500/year, maximum ₹1.5L.
My recommendation — open it, deposit in her name, let the corpus grow separately for her retirement. The 80C benefit is limited but the tax-free compounding over 15 years is genuinely powerful. Don't expect double 80C — that's not how it works.