I'm Planning Diwali Production but Don't Know How Much Inventory to Buy — How Do I Forecast Wax, Fragrance Oil, Wicks and Jars?

Three ways to forecast, and what each one is honestly good for

Most festive over-buying starts the same way: a maker remembers last year feeling busy, rounds up, and orders. Most festive under-buying starts the same way too. The fix is not a better hunch, it is three independent estimates built from different evidence, so that when they disagree you can see which assumption is doing the work.

Method A — history times a written uplift

Take your unit sales in last year's festive window, defined the same way both years — say the six weeks ending on the festival. Multiply by an uplift you can justify in one sentence. Our worked example: 240 candles last year, an uplift of 35% because the maker added a second sales channel and two scents, giving 324. Write the reason next to the number. An uplift with no sentence attached is not a forecast, it is optimism with a decimal point.

Two honest limits. First, your base has to be units, not rupees — a price rise last January will inflate a revenue-based forecast and you will buy wax for candles nobody ordered. Second, if last year you sold out early, your history records your stock, not your demand, and Method A will under-forecast for ever. If you ran out, say so and use Method C as the primary.

Method B — capacity as a ceiling, never as a forecast

Capacity answers a different question: not how many you could sell, but how many you can physically pour, cure and finish before the dispatch date. Count it in melts. A Mini Electric Wax Melter at ₹2,360.00 holds about a litre, which is roughly 900 g of soy — six candles at a 150 g fill. Assume five melt-and-pour cycles in a working day and that is 30 candles a day; eleven realistic pour days inside the window gives 330.

Those cycle and day figures are the example's assumptions, not CSI data — count your own by timing one honest batch from cold melter to poured jars, including wicking, cleaning and the wait while the melter comes back up to temperature. Most makers over-estimate pour days by counting calendar days rather than days they will actually be at the bench after work, and forget that a jar cannot be labelled the same evening it is poured.

Capacity is a ceiling in one direction only. If capacity comes out far below demand, the answer is not to buy less material — it is to decide now whether to add pour days, add a second melter, cut a size out of the range, or accept the smaller number. Deciding that in September is cheap. Discovering it on 20 October is not, because Diwali 2026 is 8 November 2026 and a soy candle still needs its cure.

Method C — weighted bottom-up, by channel

Build the number from the bottom, one channel at a time, and apply a confidence weight to each. This is the only method that works for a first festive season and the only one that survives a year when your channel mix changes. It also forces the useful conversation: which of these units are actually committed, and which are hope.

The weights are the method. Anything contracted is 1.00. A named list of past buyers is 0.6 to 0.8. Cold audience reach is 0.3 to 0.5. An event is 0.5 to 0.7 depending on how many times you have done it. Write your weights down once and reuse them every season, then check them afterwards against what actually sold — that is how the third season's forecast becomes genuinely good.

Your first Diwali: forecasting when you have no history at all

With no previous festive season, Method A does not exist and Method B is unreliable because you have never timed yourself under pressure. That leaves Method C plus a deliberately small commitment. The trick is to make the first festive order a range-narrow, depth-shallow one: fewer scents and sizes, more units of each, so the stock you hold is usable whatever sells.

A first-season plan of 120 candles across two scents in one size is not timid, it is correct: it needs 18 kg of wax, about 1,500 g of oil, 126 wicks and 126 jars, and every one of those items except the oil is still useful in January. The maker who plans 400 candles with six scents in their first festive season is not being ambitious; they are buying six kinds of leftover.

Reconciling three numbers into one you can order against

The rule is simple and deliberately conservative. Take the lower of the two demand estimates — Method A and Method C — because the one you cannot defend is always the higher one. Then cap it at Method B, capacity, because a number you cannot pour is not a plan. Then round down to something that sits neatly against pack sizes and batch sizes, so you are not buying a 500 g pack of oil to make four more candles.

In the worked example: A gives 324, C gives 309, so demand is 309. Capacity is 330, which does not bind. Rounding down to a clean 300 gives whole melts, whole jar packs and a fragrance order that lands close to pack boundaries. That is a 4.7% haircut on the lower demand figure and it buys back a great deal of tidiness.

The spread between the methods is itself information. If A and C are within about 10% of each other, you have a usable forecast and can order with confidence. If they are 40% apart, do not split the difference: go and find out which assumption is wrong, because one of them is. Usually it is the uplift in Method A or the weight on the cold-audience row in Method C, and both are cheap to interrogate before you have spent ₹56,409.40.

From units to grams to packs: the conversion that decides the order

Four conversions, in order. Units × fill weight = wax. Wax × load = fragrance oil, using percentage of wax weight, which is how CSI product pages state loads — CSI 464's page gives a maximum of 10%, so 8% sits comfortably inside it. Units + spares = wicks, jars and stickers. Then, last, round each material up to real pack sizes — which is the step that turns a tidy forecast into an actual invoice.

Split by scent before you convert the oil, because only the oil is scent-specific. A 40 / 35 / 25 split across three scents on 300 candles is 120, 105 and 75 candles — and at 12 g a candle that is 1,440 g, 1,260 g and 900 g of oil. Wax, wicks, jars and stickers are shared, so the split does not touch them at all. That is the single strongest argument for a narrow scent range at festive time: only one line on the order is exposed to getting the split wrong.

Two pack-boundary decisions in that table are worth spelling out, because they are the difference between buying well and buying by reflex. Rajnigandha needs 1,298 g. Three 100 gm packs on top of the kilo would give 1,300 g for ₹5,960.00; a 500 gm pack gives 1,500 g for ₹6,760.00. The second costs ₹800.00 more and yields 200 g more, an effective ₹4.00 a gram against a 100 gm rate of ₹5.00 — so the bigger pack is cheaper for every gram of the difference, and the leftover is a scent you will sell again. Roasted Coffee needs 927 g, and the 1 kg pack at ₹3,738.00 is both cheaper and larger than two 500 gm packs at ₹3,780.00. Check the boundary every time; the answer is not always the bigger pack, but it is often enough to be worth ninety seconds.

Finally, reconcile what you bought against what you will consume. At a 40 / 35 / 25 scent split the blended oil cost is ₹52.72 a candle, so the materials actually consumed come to ₹167.55 a candle and ₹50,265.38 across the run. You are spending ₹56,409.40. The ₹20.48 a candle difference is not waste — it is the margin and the pack rounding, sitting on your shelf as wax, oil, wicks and jars you will use in December. Only the part you throw away is waste, and on this specification almost none of it is.

The safety margin, material by material — and why one number for everything is wrong

The right margin on a material depends on three things: how likely you are to lose some of it, what a unit costs, and whether the leftover is still useful in February. Wax scores well on all three, fragrance badly on the third, and wicks so well on the second that being generous costs almost nothing.

Read the last row again, because it is the one that actually loses money at festive time and the one CSI cannot price for you. Wax, oil, wicks and jars are all generic: buy 20% too many and you have next quarter's stock. A carton printed with a Diwali motif, or a label with a date on it, is worth nothing the day after 8 November 2026. If you are going to be brave with a margin anywhere, be brave on the materials that keep, and be ruthless about ordering printed packaging against the reconciled number rather than the optimistic one.

Working back from 8 November 2026

Diwali 2026 falls on 8 November 2026. A soy container candle's throw keeps developing after the pour — the Luxury Soy Wax Chunks page asks for at least 48 hours and ideally one to two weeks before burn testing, and 14 to 21 days by fragrance family is standard practice. That cure is the fixed element in the plan; everything else has to fit around it. We will not quote transit times — that is your courier's figure and you should put your own number in.

The row that catches people is the first one. A new scent cannot be forecast until it has been tested, and testing it takes a fortnight of cure you have to spend before, not after, the production order. That is why a festive range should be locked by late September: not because materials are scarce, but because the calendar has already spent the time you would need to change your mind.

One published CSI review asks, politely, whether delivery could be a little quicker. It is a fair point and it is exactly why this table places the order before the pour window rather than inside it: whatever your supplier's dispatch and your courier's transit turn out to be, the way to make them harmless is to stop them sitting on the critical path. Order early, hold the stock, pour to a calendar.

When the forecast is wrong — and it will be, in one direction or the other

Short by 50 candles. The money is the easy part. Topping up 50 candles late, in the smallest sensible packs — a 5 kg plus three 1 kg packs of wax, 100 gm oil packs, a 50-wick pack, a 50-jar pack and two sticker sheets — costs ₹9,732.28, or ₹194.65 a candle against the planned ₹188.03. A ₹6.61 a candle penalty is survivable. The calendar is not: a top-up ordered on 20 October cannot be received, poured, cured for 14 days and dispatched before 8 November 2026. Being short in the last fortnight is a lost sale, not an expensive one.

Long by 50 candles. You are holding about 7.5 kg of wax, 600 g of oil, 50 wicks and 50 jars. At ₹507.40/kg the wax is ordinary stock with a stated 60-month shelf life; the wicks and jars are ordinary stock; only the oil is tied to a scent, and at a 500 gm pack of Apple Cinnamon that is ₹2,371.80 sitting in a cupboard rather than lost. Provided you did not print 50 extra Diwali cartons, over-forecasting on raw materials is a cash-flow problem for one quarter, not a write-off.

That asymmetry is the whole reason the reconciliation rule leans the way it does. On shared materials — wax, wicks, jars, stickers — being 10% long is cheap and being 10% short can cost you the season, so buy to the top of the range. On scent-specific and dated items — fragrance oil and printed packaging — being long is where the money actually disappears, so buy to the reconciled number and keep a 100 gm pack in reserve.

Afterwards, do the one thing almost nobody does: write down what actually sold, by scent and size, next to what you forecast. Three numbers — forecast, made, sold — per scent, on one line each. That single note turns next year's Method A from a guess into a measurement, and it is the reason a third festive season is usually the first genuinely accurate one.

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