Last reviewed on 29 September 2026.
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The first distinction: employment or practice
If you are employed and nutrition work is a side activity, you have two kinds of income and they are treated differently. If the practice is your only work, all of it is business or professional income.
People running a practice alongside a job routinely assume the second kind is too small to matter. Whether that is true is a question with an actual answer, and it is worth getting rather than assuming, because the consequence of being wrong accrues quietly across years.
What counts as income
Everything a client pays you for your services: consultations, packages, group programmes, recorded courses, corporate work, speaking fees. Whether it arrived by bank transfer, a payment gateway or cash makes no difference to whether it is income. Only to how easy it is to prove.
That last point is the practical one. A practice paid largely in cash is not doing anything wrong, but it is carrying a burden of proof it could have avoided.
What you can usually set against it
Business income is taxed on profit, not on turnover, so legitimate costs of earning it generally reduce the figure. For a nutrition practice these typically include the things you would expect: professional subscriptions, the software you consult through, a proportion of phone and internet, travel to see clients, professional indemnity cover, continuing education, and the cost of the tools of the work.
Two cautions. Personal and business use have to be apportioned honestly rather than generously, and a claim you cannot evidence is a claim that causes trouble later. Keep the receipt at the moment of spending, because nobody has ever successfully reconstructed a year of small expenses in April.
Whether the course that qualified you is itself deductible is a separate and more interesting question, covered in is a nutrition course a tax deductible expense.
Presumptive taxation, and why people ask about it
There are schemes that let small professionals declare a presumed proportion of receipts as profit rather than maintaining full accounts. They exist to spare very small practices the cost of detailed bookkeeping.
Whether you are eligible, and whether it is advantageous, depends on your receipts, your actual expense ratio and what else you earn. It is genuinely a case by case calculation and a good use of an hour with an accountant in your first year. What it is not is a default that everyone should take.
Advance tax, the thing that surprises people
Salaried people are used to tax being deducted before they see the money. Practice income does not work that way, and where liability crosses a threshold it is payable in instalments across the year rather than in one payment afterwards.
The practical failure is predictable: a first good year, no provision made, and a bill that arrives after the money has been spent. The defence is unglamorous. Set aside a proportion of every payment into a separate account from the first client, before you know whether you will need it. Practitioners who do this describe it as the single habit that made the first two years calm.
When a client deducts tax before paying you
Corporate clients and some institutions deduct tax at source and pay you the balance. That deducted amount is not lost; it is credited against your liability, and it appears in your annual tax statement.
What matters is that you reconcile what you were paid against what was deducted, and that the details the payer used are correct. Practitioners who ignore this usually discover the mismatch a year later, when correcting it means chasing somebody in an accounts department who has moved on.
The records that make everything else easy
Not accounting software, necessarily. A consistent habit. Every payment recorded with a date, a client reference and an amount. Every expense photographed and filed the day it occurs. Bank statements downloaded monthly rather than hunted for annually.
The wider set up sequence, including Udyam registration and the data obligations that come with client records, is in building a nutrition practice in India, and the indirect tax question is separate again: see GST for nutritionists in India.
What to take to an accountant, and when
Go once in your first year, before the filing deadline rather than during it. Take a list of what you charge for, your expected receipts, your actual expenses, whether you have other income, and whether any client deducts tax at source.
An hour costs less than the average mistake, and the main value is not the filing. It is being told which of the several possible treatments applies to you, so that the next three years run on a decision rather than a guess.
The two mistakes that cost most
Mixing practice money with household money, and starting the records in year two. Both are recoverable and both are tedious to recover from, and the recovery always lands in the week you can least afford it.
There is a third that is subtler: treating the practice as too small to bother with until it suddenly is not. The transition from a few clients to a real income rarely announces itself, and the practitioner who had records all along simply carries on while the one who did not spends a month reconstructing a year.
The honest summary
Separate the money, invoice everything, keep receipts as they happen, and put a share of each payment aside for tax before you need it. Then take one hour with a chartered accountant in your first year and get your actual position in writing. Everything else in tax is detail; those five things are what make the detail manageable.