How Do I Compare Fragrance Oils by Cost per Finished Candle Rather Than Simply Comparing Price per Kilogram?

Where fragrance sits in a real candle cost

A worked 200 g candle, so the comparison has a home: CSI Lavender at 8% bought as 100 g bottles, Luxury Soy Wax Chunks, one Eco C2 wick, and your own jar and box (worked examples; use your own). The second set of columns shows the same candle with the oil bought as a 1 kg pack, nothing else changed.

Fragrance is about a third of this candle and wax about two-fifths. The pack change alone saves ₹2.86 a candle: at 200 candles a month (worked example) that is ₹572.00 a month, ₹6,864.00 a year. A kilo of Lavender makes 62 candles at 16 g; at 200 a month you use 3,200 g a month, so you would be reordering kilo packs several times a month. Here the bigger pack is a sensible buy. It is not a large one, and on this oil the load is the far bigger lever: if your test approved 6% instead of 8%, you would save ₹20.88 of oil a candle, less ₹2.40 for the wax that replaces it, ₹18.48 net, ₹44,352.00 a year. That is the order of attack this cluster's hub sets out in the 35%-fragrance decision tree: pack, then load, then oil.

The reusable table: seven oils, three loads, two sizes

Seven CSI candle oils, chosen to span the price list from the cheapest kilo to a premium gourmand, priced at the 1 kg per-gram rate, at 6%, 8% and 10% of total candle weight. Each oil's page states a candle range or maximum of 10%, so all three rungs sit inside the oil page's stated limit; check your wax's ceiling too. Use the table as a planning grid, then overwrite the column your test approves.

Three readings are worth making every time. Across a row, every two points of load is a fixed rupee step: ₹11.33 a 200 g candle for Citrus Lemon, ₹20.88 for Lavender, ₹30.58 for Dark Vanilla. The dearer the oil, the more a load test is worth. Down a column, the per-kilo order holds: at the same load, cheaper per kilo is cheaper per candle. Across columns, it breaks: Dark Vanilla at 6% is ₹35.11 dearer than Citrus Lemon at 10%, but Eucalyptus Spearmint at 10% is ₹1.29 cheaper than Lavender at 6%. Price per kilo only ranks oils correctly if they need the same load, and you do not know that until you test.

Pack size: the lever people forget

On each of these seven oils the per-gram price falls more from 15 g to 100 g than from 100 g to 1 kg. A small maker comparing oils in sample bottles is mostly comparing bottle sizes. Here is the same 16 g (a 200 g candle at 8%) priced at three pack sizes:

The 15 g column is where the money hides: 16 g of Citrus Lemon from 15 g bottles is ₹41.54 dearer than from a 1 kg pack, more than the gap between 16 of the 21 pairs of these seven oils at 8%. Citrus Lemon is 48% cheaper per gram at 1 kg than at 15 g; Lavender 25%. The 100 g-to-1 kg column is smaller and uneven: from ₹7.55 a candle on Eucalyptus Spearmint down to nothing on Woody Oud.

Effective cost: only at the load your test approves

Suppose you are choosing an oil for one place in your range, a fresh, clean scent, and you test three CSI oils in the same 200 g candle, wax, jar and wick. In this worked example (hypothetical results, not CSI claims) your blind panel approves Citrus Lemon at 10%, Eucalyptus Spearmint at 8% and Lavender at 6%. Read the outlined cells in the diagram:

The cheapest oil per kilo comes second: Eucalyptus Spearmint is ₹7.55 a candle cheaper than Citrus Lemon, worth ₹18,120.00 a year at 200 candles a month. Lavender stays dearest even with the lowest approved load, by ₹13.56 against the mint and ₹6.01 against the lemon, because its per-kilo price is too far above the others for a 6% approval to close. Adding the wax changes the size of the gaps, not the order. In a 150 g candle the same approvals give ₹42.48, ₹36.82 and ₹46.99: same order. When two oils' effective costs land within a rupee or two of each other, the wax term can decide the winner; the worked case of exactly that is the ₹4,500 at 6% against ₹2,500 at 10% sum.

Two cautions keep this honest. The three oils are different scents, so the cheapest is only the answer if any of them would do for your customers; if your range needs lavender, the comparison that matters is between lavenders. And an approved load is only as good as the test behind it: three candles per rung, full burns, blind judging. A load "approved" on one evening's sniff is a guess with a number on it.

How to log it so the numbers stay true

Keep one log, one row per oil, and let a spreadsheet do the arithmetic. The columns below are the minimum; the example rows use CSI prices from 4 October 2026 and worked-example loads.

The test reference is the column most logs leave out and most mistakes come from. It ties the load to a batch sheet: wax lot, oil lot, wick, jar, pour and cure dates, burn results. When a price changes, update one cell; when a test changes a load, update one cell; everything downstream recalculates. When the price of an oil you already use goes up, the log tells you in seconds what it does to COGS, which is the fragrance price-rise post's first step.

The decision rule, and the test gate

With the log filled, the rule is short. One: compare only oils that could fill the same slot. Two: rank them on ₹ per candle at approved loads, at the pack you would actually buy. Three: multiply the gap by candles a month × 12. Four: act when that annual figure clearly exceeds the cost of the test and any change you must make (labels, recipe cards, the old oil left on the shelf); a payback inside about six months is a sensible bar (judgement). The pack-size change on Lavender above (₹6,864.00 a year, no test needed, same oil) clears it immediately. An oil change needs the full gate.

Set that against the gap you are chasing: the mint-over-lemon difference of ₹7.55 a candle is ₹18,120.00 a year at 200 a month, so the comparison repays its materials within the year at that volume and well inside it at higher volumes. At 50 candles a month it may not, and the honest answer is to keep the oil you have. Which percentages to put on the ladder, and how many candles per rung, is the lower-load test design; what to retest when the oil itself changes is the fragrance-change retest list; and how to test cost-down alternatives without risking a bestseller is the 10% cost-reduction test plan.

Oils and wax used in the tables

Five products from the tables above, chosen to show the range of CSI's price list and the pack-ladder lessons, on page statements, prices and stock on 4 October 2026. CSI publishes no throw or burn data, so nothing here is ranked on performance. The oil tables price 16 g, a 200 g candle at 8%.

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