A Cheaper Wax Saves Me ₹20 Per Candle but Requires More Rework and Produces More Rejects — How Do I Compare the True Cost Against a More Expensive Wax?

Cost the whole candle first, then the rejects

The mistake that makes this question hard is costing the rejects in wax. They are not wax. When a candle fails, the jar has already been filled, the fragrance has already been stirred in and the wick has already been stuck down, so what you lose is the entire unit — and on most cost sheets the wax is the smallest part of it. That is why a cheaper wax can look like a clear win and turn out to be a slow leak.

So build both candles in full before touching the reject rate. Here are two, identical except for the wax, costed on live CSI stock in September 2026 at the series unit of 200 g of wax at an 8% load — 16 g of fragrance oil, 216 g of fill, and that is the fill reading carried through this whole page. The cheaper wax is Eco Soy CSI 400 at the 5 kg pack, ₹399.20 a kilogram. The dearer is Luxury Soy Wax CSI 464 at the 5 kg pack, ₹507.40 a kilogram. Everything else is common to both: Fallen Leaves at ₹4.25 a gram, a Black Glossy Glass Jar at ₹70.80 a piece and an Eco Candle Wicks Thin (C1) at ₹5.90.

Read the last three rows before anything else. The wax is 35.6% of the cheaper candle and 41.2% of the dearer one. Everything else — fragrance, vessel, wick — is identical and comes to ₹144.67 in both columns. So a reject on the cheaper wax destroys ₹224.51 in order to have saved ₹21.64, which is the whole argument in one sentence: one reject cancels ₹224.51 ÷ ₹21.64 = 10.4 candles' worth of wax saving.

Effective cost per good candle

The formula is short. If you pour a batch and a fraction r of it is unsellable, the candles you can actually invoice are (1 − r) of what you poured, and every one of them has to carry the materials of the failures. So effective cost per good candle = cost per candle poured ÷ (1 − r). Nothing else changes; you simply stop pretending that pouring and selling are the same number.

Take your own description at face value — the cheaper wax produces more rejects — and put working figures on it. This page assumes 8% rejects on the cheaper wax and 3% on the dearer. Those are assumptions, stated as assumptions, not measured data and not CSI figures; replace them with your own batch record the moment you have one, because the answer moves quickly with them. On those assumptions the cheaper candle costs ₹224.51 ÷ 0.92 = ₹244.03 per good unit and the dearer costs ₹246.15 ÷ 0.97 = ₹253.76.

The cheaper wax is still ahead — by ₹9.73 instead of ₹21.64. More than half the advantage has gone, and it has gone into candles nobody will ever see. Across a hundred good candles that is ₹24,403.04 against ₹25,376.08, a difference of ₹973.04, where the headline figure would have promised ₹2,164.00.

Rework: where the cost goes when it stops being material

Your question separates two things that are usually lumped together — rework and rejects — and it is right to. Not every failure is a scrap. A sunken top, a frosted face, a wick that set off centre: in general candle-making practice these are often recoverable by remelting the pour and going again, and when they are, most of the material comes back. What does not come back is the time.

Price the remelt honestly. The jar survives. Most of the wax survives — this page assumes 10% of it stays in the pot, an assumption and not a measurement. The wick does not survive and is a fresh ₹5.90. The fragrance is the awkward one: some of it is lost to the second heating, and this page assumes a 50% top-up, again an assumption. On those figures, a remelt on the cheaper wax costs ₹47.87 in materials and a remelt on the dearer wax costs ₹50.03 — against ₹224.51 and ₹246.15 for scrapping the unit outright.

Now assume 60% of rejects are recoverable on both waxes — three in five — and rerun the sum. The cheaper wax comes to ₹234.30 per good candle and the dearer to ₹250.05, so the cheaper wax's advantage widens to ₹15.75. That result surprises people, and the reason it happens matters more than the number: rework converts a material loss into a labour cost, and a materials sheet can only see the first half of that trade.

That blank row is the whole post, so it is worth spelling out. The cheaper wax needs 3.0 more remelts per 100 candles on these assumptions. Put a time on one remelt — melt, pour, clean the pitcher, re-wick, wait for the cure again — and multiply. If a remelt takes twenty minutes of your evening, 3.0 of them is an hour per hundred candles, and the material advantage of ₹15.75 a candle is ₹1,574.58 per hundred. Whether an hour of your time is worth ₹1,574.58 is a question only you can answer, but you cannot answer it until both numbers are on the page.

How far the reject rate can drift before you lose

The reject rate is the one figure in this comparison you can actually measure, so it deserves a table of its own. Hold the dearer wax at its assumed 3% — an effective ₹253.76 per good candle with every reject scrapped — and walk the cheaper wax's reject rate upwards. Where the two columns meet is where your cheaper wax stops being cheaper.

Two readings of that table are worth taking away. The first is that the cheaper wax has a lot of room: it can fail nearly four times as often as the dearer one and still be the cheaper choice on materials. The second is that the room is not infinite and the fall is steep — at 20% rejects the cheaper wax is ₹26.87 a candle worse, which on a hundred candles is ₹2,687.42 spent to save ₹2,164.00. Your batch record is the only thing that tells you which side of 11.5% you are on, and a week of counting will settle it.

Two costs of a cheaper wax that never reach the cost sheet

Start with freight, because it is the one that can swallow the whole comparison. CSI's delivery charges are published flat rates by weight band, set by the stored packed weight. The 5 kg pack of Eco Soy CSI 400 stores 6.0 kg and the 5 kg pack of Luxury Soy Wax CSI 464 stores 6.0 kg, so both fall in the same band at ₹630.00 on Standard Shipping in September 2026. Five kilograms of wax is 25 candles at 200 g, so that delivery is ₹25.20 a candle — larger than the ₹21.64 the wax swap saves you.

That is not an argument against the cheaper wax; it applies equally to both. It is an argument against buying wax in small consignments while fretting over a rupee on the grade. Two checks are worth doing every time. First, the pack: five 1 kg packs of Luxury Soy Wax CSI 464 store 7.5 kg against 6.0 kg for one 5 kg pack, so the same ₹507.40 a kilogram of wax costs ₹800.00 to deliver as 1 kg packs and ₹630.00 as a single 5 kg pack — ₹170.00, or ₹6.80 a candle, for choosing the bigger pack at an identical rate. Second, the order: two 5 kg packs sent separately are ₹1,260.00 against ₹1,200.00 together, a difference of ₹60.00.

Do not turn that into a rule, though. The bands have edges and they bite both ways — Standard Shipping stops at 15 kg, so a very large consignment can cost more in one parcel than in two, and a weight that just crosses an edge can cost more than a heavier one inside the next band. Check the weight you are actually shipping. Several reviews on the store say plainly that delivery charges feel high; the honest response is to consolidate and to check the band, not to pretend the charge is small.

The second hidden cost is information, and it is specific to this pair. The Luxury Soy Wax CSI 464 page publishes a working range of 80–90°C for melting and pouring, a stated maximum fragrance load of 10% of total wax weight and a stated shelf life of 60 months. The Eco Soy CSI 400 page publishes an add-fragrance temperature of 85°C, within 80–90°C, with gentle stirring for two minutes and a direct pour — but it does not publish a fragrance-load maximum. So on this pairing the only published load limit you have for the cheaper wax is the one on the oil page: Fallen Leaves states 6–10% of total wax weight, which is why 8% is used throughout. If you pair the cheaper wax with an oil that publishes nothing either, you have no published limit at all, and the sensible course is to ask on WhatsApp and to test at the bottom of the range.

Price that honestly and it is a real, if one-off, cost. Establishing a load you can trust on an unfamiliar wax takes a test batch — wax, oil, jars, wicks and three weeks of cure before the verdict is fair. Ten test candles on the cheaper stack is ₹2,245.08 of materials plus the waiting, and it has to be spent before the ₹21.64 a candle starts counting. Across a first order of 25 candles that is ₹89.80 a candle of set-up; across a thousand candles it disappears. The saving is real for a maker who pours volume and illusory for one who pours a batch a month.

What this page will not put a number on

Every rupee figure on this page is either a live CSI price in September 2026 or something derived from one, and every rate that is not a price is an assumption, labelled as one. The rest of the true cost of a reject belongs to you. Copy these rows and fill them from your own records.

One last honest note on the two grades themselves, because a costing page should not pretend a rupee figure is the whole story. Eco Soy CSI 400 is described on its page as a single-pour soy that needs no additives, with Eco Wicks recommended; Luxury Soy Wax CSI 464 is described as a single-pour container wax with excellent glass adhesion, a creamy opaque finish and low frosting. Neither description is a promise about your jar, your room temperature or your cure, and neither this page nor any product page can tell you which one rejects less in your workshop. That is a burn test, not a calculation. What the calculation does is tell you exactly how much a test batch is worth: on these assumptions, ₹973.04 per hundred candles, which is more than the test costs.

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