A client delays your payment past 45 days, and you assume the only consequence is to you, lost cash flow, a stressful follow-up conversation, maybe eventually a legal notice. What most freelancers don't realize is that if they are Udyam-registered and the client is on accrual accounting, the delay also costs the client something real on their own tax return, their deduction for your fee gets pushed out of the financial year they expected to claim it in.
Here is how Section 43B(h) of the Income Tax Act actually works, why it gives you real leverage in a payment conversation that has nothing to do with legal notices or court filings, and how to use it without sounding like a threat.
Section 43B(h) ties your client's own tax deduction to paying you on time
Introduced by the Finance Act, 2023 and effective from FY 2023-24 onward, Section 43B(h) states that any amount owed to a micro or small enterprise is only deductible as a business expense in the year it is actually paid, if payment happens beyond the time limit specified under the MSMED Act (generally 45 days). For a client who normally accounts on an accrual basis, claiming the expense the moment the invoice is raised regardless of whether it's paid, this is a real change: pay late, and the deduction for that expense doesn't disappear, but it gets pushed out to whichever financial year the payment actually clears, which can genuinely disrupt a client's tax planning for the year they expected to claim it.
This only applies when the supplier, you, is Udyam-registered as a micro or small enterprise, and it explicitly excludes medium enterprises, so the leverage is specific to smaller freelancers and small businesses, which is most solo freelancers and small agencies. See the guide on GST vs Udyam registration for freelancers in India if you haven't registered yet, since this leverage simply doesn't exist for you without it.
Why this matters more to a client's accountant than a legal notice does
A legal notice signals a dispute and a potential escalation, which many businesses have learned to tolerate or delay responding to. A tax deduction disappearing for the year is a concrete, quantifiable cost that a client's own CA or finance team will flag during tax planning, often well before year-end, since nobody wants to discover a disallowed expense during filing season that could have been avoided by simply paying an invoice on time.
This is why mentioning this provision, calmly and factually, often moves a stalled payment faster than another round of polite follow-up messages: it reframes the delay from "inconvenient for the freelancer" to "a real cost to the client's own tax position," which is a very different conversation for whoever on their side actually manages the books.
How to actually use this in a conversation, without it reading as a threat
State it as a shared fact, not a warning: "Just flagging, since I'm Udyam-registered, Section 43B(h) means this invoice needs to clear within 45 days for your team to claim it as a deduction this financial year, wanted to make sure that's on your radar before it becomes a bigger issue at filing time." This framing positions you as helping the client avoid a problem, not threatening them with one, which lands very differently even though the underlying leverage is identical.
Mentioning your Udyam registration status upfront, in your contract or your standard invoice terms, is what actually activates this leverage in the first place, since a client has no reason to think about the provision at all if they don't know you qualify as a micro or small enterprise supplier.
This pairs naturally with the formal escalation path, not a replacement for it
This provision works best as an early, informal nudge, mentioned before a situation escalates to a formal legal notice or a government complaint. See the guide on the MSME Samadhaan portal for forcing client payment for the formal enforcement mechanism this tax leverage sits alongside, since the two work well together: the tax deduction risk is a quiet nudge, and Samadhaan is the harder escalation if that nudge doesn't work.
Making your registration status visible from the start
Rinto's invoices auto-fill your saved client and business details every time, so stating your Udyam registration clearly and consistently on every invoice is a one-time setup rather than something you have to remember to add manually each time you bill.
Frequently Asked Questions
What is Section 43B(h) and how does it affect a client who pays me late?
Section 43B(h), introduced by the Finance Act, 2023 and effective from FY 2023-24, states that an amount owed to a Udyam-registered micro or small enterprise is only tax-deductible in the year it is actually paid, if payment happens beyond the MSMED Act's time limit, generally 45 days. For a client on accrual accounting, this means a late payment doesn't just delay their deduction, it eliminates it for that financial year entirely.
Does Section 43B(h) apply to every freelancer client relationship?
It applies specifically when the supplier, the freelancer, is Udyam-registered as a micro or small enterprise, and the provision explicitly excludes medium enterprises. It also matters more to clients who account on an accrual basis and have real tax planning at stake, so the leverage is strongest with established, tax-compliant business clients rather than very small or informal ones.
How should I bring up Section 43B(h) with a slow-paying client?
Frame it as a helpful, factual heads-up rather than a threat: mention that your Udyam registration means the invoice needs to clear within the MSMED Act's time limit for them to claim the deduction this financial year, and that you wanted it on their radar before filing season. This positions you as helping them avoid a tax problem rather than threatening escalation, which tends to land better and move faster than another generic follow-up.
Does a client need to know I'm Udyam-registered for this leverage to work?
Yes, a client has no reason to think about Section 43B(h) at all if they don't know you qualify as a Udyam-registered micro or small enterprise supplier. Stating your registration status clearly on your invoices and in your contract from the start is what actually activates this leverage, rather than something to only bring up after a payment is already overdue.
Is Section 43B(h) a replacement for a legal notice or MSME Samadhaan complaint?
No, it works best as an earlier, informal nudge before a situation escalates that far. Mentioning the tax deduction risk calmly is a good first step once a payment is getting close to or past 45 days, while a formal legal notice or an MSME Samadhaan complaint remain the stronger escalation paths if that initial nudge doesn't resolve the delay.