A Bahadurgarh manufacturing client called me last Tuesday in a panic — half the shop floor had submitted Form 12BB blank, three line managers had ticked both regimes, and one engineer was insisting his regular 1-year fixed deposit qualifies under 80C (it doesn’t). Sound familiar?

If your inbox looks like this in late April, you’re not alone. The investment declaration window for FY 2026-27 is the messiest part of the payroll year, and the choices your team locks in over the next two weeks will shape every payslip from May 2026 to March 2027.

TL;DR — The Quick Answer

FY 2026-27 began 1 April 2026; the new tax regime is default unless your employee actively opts out.
Slabs are unchanged from last year: nil up to ₹4 lakh, then 5%/10%/15%/20%/25%/30% up to ₹24 lakh and above.
Standard deduction is ₹75,000 in the new regime and ₹50,000 in the old. Section 87A rebate makes income up to ₹12 lakh effectively tax-free in the new regime — ₹12.75 lakh for salaried employees.
Collect Form 12BB now in April-May. Investment proofs are a separate exercise in January 2027.

What is an investment declaration, and why April is the right time?

An investment declaration is the document — Form 12BB under Rule 26C — where your employee tells you what tax-saving investments and exemptions they expect to make during the year. You then use this declaration to compute monthly TDS on salary under Section 192 of the Income Tax Act.

Skip this step and you have to deduct TDS as if the employee has zero exemptions. That blows up their April-June take-home and triggers the kind of payroll queries that will eat your week. The timing matters even more this year because the new Income Tax Act 2025 came into effect on 1 April 2026, and the regime your employee picks now drives every payroll calculation for the next 12 months.

New regime vs old regime — the choice every employee must make

Since FY 2023-24, the new tax regime is the default. Your employee gets the old regime only if they actively elect it. Here’s the side-by-side for FY 2026-27:

Item	New Regime (Default)	Old Regime
Basic exemption	₹4,00,000	₹2,50,000 (under 60)
Standard deduction	₹75,000	₹50,000
Section 87A rebate	Income up to ₹12L tax-free; ₹12.75L for salaried	Income up to ₹5L
80C, 80D, HRA, LTA	Not allowed	Allowed
Employer NPS u/s 80CCD(2)	14% of basic	10% of basic
Form 10-IEA needed?	No	Yes, for those with business income; salaried can opt out via declaration

For most salaried employees earning under roughly ₹15 lakh, the new regime now wins outright. The 87A rebate plus the bigger standard deduction make it tough for the old regime to compete — unless the employee already runs a fat home loan or a long 80C portfolio.

When the old regime still makes sense

Home loan interest above ₹2 lakh under Section 24(b).
Combined 80C, 80D, and HRA together exceeding roughly ₹3 lakh.
Senior-citizen parents covered under health insurance (₹50,000 under 80D).
An ELSS or PPF habit the employee has built over five-plus years and isn’t ready to abandon.

The Form 12BB checklist — what to actually collect

Form 12BB is the prescribed format. Make it the single source of truth in your declaration drive. Here is the field-by-field checklist your team should fill before they sign:

House rent paid, plus landlord’s name, address, and PAN (PAN is mandatory if annual rent exceeds ₹1 lakh).
LTA claims with travel dates, ticket evidence, and the route.
Home loan interest, with lender name, loan account number, and lender PAN.
Section 80C investments — PPF, ELSS, life insurance premium, principal repayment, tuition fees for two children, Sukanya Samriddhi, NPS Tier I, 5-year tax-saving FD. Combined cap: ₹1.5 lakh.
Section 80D — health insurance premium for self, family, and parents (₹25,000 + ₹50,000 if parents are senior citizens).
Section 80CCD(1B) — extra ₹50,000 in NPS Tier I (old regime only).
Section 80E — education loan interest, no upper cap, available for 8 years.
Section 24(b) — home loan interest, up to ₹2 lakh for a self-occupied property (old regime only).
Other Chapter VI-A claims — 80G donations, 80TTA savings interest, 80U disability.
Regime declaration — tick old regime explicitly if opting out of the default.

What HR managers get wrong (and how to fix it)

1. Treating the declaration as a one-time form

An April declaration is not a contract. Employees revise — especially after Diwali bonuses or a mid-year hike. Build in a structured revision window in October, and another light one in January when proofs come in.

2. Not flagging the regime decision in writing

Some employees tick old regime in April, then in February realise they invested in nothing and want to switch back. Salaried employees can switch regimes every year, but only at return filing — your payroll TDS for the rest of the year is locked. Tell them this clearly in writing the day they pick.

3. Mixing declaration with proof submission

Declaration is April. Proof submission is January. They are different things. Treating them as the same step is the classic small-company mistake — and your January proof drive is where 80% of the wrong claims surface.

4. Letting employees self-declare rent above ₹1 lakh without PAN

The CBDT audits this. If an employee can’t produce the landlord’s PAN, you cannot allow the HRA exemption. Period. A signed declaration of “landlord refused” is not a valid substitute.

5. Not adjusting TDS for joiners and exits

A mid-year joiner needs Form 12B from their previous employer showing income earned and TDS already deducted. Skip it and you under-deduct — the employee gets a tax demand in July, and the angry email comes to you.

A 5-step rollout plan you can run this week

Day 1-3: Send one email to all employees with Form 12BB, the regime comparison table above, and a hard deadline. 15 May works for most teams.
Day 4-10: Hold one 30-minute group session per location walking through old vs new regime with three salary cases — ₹6L, ₹12L, and ₹24L. Don’t give individual tax advice; that’s the employee’s CA’s job.
Day 11-15: Collect declarations through a digital workflow. Paper and WhatsApp PDFs create reconciliation hell.
Day 16-20: Sanity-check the totals. An employee earning ₹4 lakh and declaring ₹3 lakh in investments is a red flag — not always wrong, but always worth a conversation.
Ongoing: Lock declarations into payroll, regenerate the TDS schedule, and share an updated payslip projection so nobody is shocked in May.

How smart teams run this in days, not weeks

A 220-employee logistics firm in Faridabad we worked with last year cut their declaration cycle from 26 days to under a week. What changed: Form 12BB became a digital workflow inside their employee self-service portal, a regime calculator showed each employee their projected take-home under both regimes side-by-side, and the payroll engine auto-recomputed TDS the moment a declaration was submitted.

If your team is still chasing scanned PDFs on WhatsApp, EZHRM’s payroll software and built-in TDS & Form 16 module handle the entire declaration-to-Form-16 cycle on one platform. The compliance dashboard flags missing PANs, unrealistic claims, and regime conflicts before they ever hit a payroll run. You can also point employees at the free PF & ESI calculator to model their take-home before locking the declaration.

FAQ — Investment Declaration FY 2026-27

Can an employee change their tax regime mid-year?

No. Once you lock the regime in April for payroll TDS, it cannot be switched for the rest of the financial year. The employee can pick a different regime at return filing in July 2027 — they will just need to claim any refund through that return rather than through your payroll.

What happens if an employee doesn’t submit Form 12BB at all?

You must deduct TDS treating the new regime as default with only the ₹75,000 standard deduction. No 80C, no HRA, no home loan benefit. Take-home will be lower than expected, and the employee will claim a refund at return filing — not the most fun way to end the year.

Is a rent receipt enough for HRA, or do I also need landlord PAN?

For annual rent up to ₹1 lakh, rent receipts are enough. Above ₹1 lakh per year, the landlord’s PAN is mandatory under CBDT rules. If the landlord refuses, you cannot allow the HRA exemption — even with a written declaration from the employee.

My employee invested ₹2 lakh in PPF — can I allow ₹2 lakh under 80C?

No. The Section 80C combined cap is ₹1.5 lakh across all instruments. The extra ₹50,000 sits idle for tax purposes — unless it goes into NPS Tier I, which opens up a separate ₹50,000 deduction under Section 80CCD(1B), but only in the old regime.

Does the new tax regime allow employer NPS contribution?

Yes — and this is one of the few exemptions retained in the new regime. Under Section 80CCD(2), an employer can contribute up to 14% of basic salary into the employee’s NPS Tier I, and the full amount is deductible from taxable income. It’s a quietly powerful tool for tax-efficient compensation in the new regime.

When is the deadline for investment proof submission?

Most companies set 31 January 2027 as the internal proof deadline so February payroll can finalise TDS. Statutorily, you have until you issue Form 16 — due 15 June 2027 — to verify and reconcile.

The bottom line

Investment declaration looks like paperwork, but it is where your team’s trust in payroll is built — or quietly broken — every April. Run it tight in the next three weeks and the rest of FY 2026-27 will be calmer than you expect. If you’d rather not run it on spreadsheets, take a look at how EZHRM’s payroll suite handles the full declaration-to-Form-16 cycle in one workflow.

Investment Declaration FY 2026-27: HR Manager’s Checklist