Average Rate Index (ARI)
In hotel revenue management, ARI (Average Rate Index) is your ADR divided by your competitive set's ADR, showing whether you are achieving more or less than the market's average rate.
It is the price half of the competitive picture, and the more reliable of the two indices when your comp set contains properties of very different sizes.
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What is ARI?
ARI indexes ADR the way MPI indexes occupancy. Above 1.0 means you achieved a higher average rate than the properties you compete with. Below means lower.
The critical thing to understand is that it measures achieved rate, not published rate. Two properties can advertise identical rates and post very different ARIs, because one discounted through OTA promotions, negotiated corporate rates and last-minute drops while the other held.
That is what makes ARI more informative than rate shopping alone. Rate shopping shows you what competitors are asking. ARI shows you what they got, which is a different and usually smaller number.
Some reports express it out of 100 rather than 1.0. A few call it the ADR index, which is clearer.
ARI is also more robust than MPI when your comp set has wide size variation. Occupancy-based indices get dominated by the largest property in the set, since it contributes the most room nights. Rate comparisons are less distorted by scale, so in a mixed-size comp set ARI is the number to trust first.
Resources: ADR · MPI · Rate shopping
How ARI works in practice
Divide your ADR by the comp set's ADR for the same period.
Worked example. A 46-room inn achieves $186 ADR in October against a comp set averaging $164. ARI is 1.13, so the property is achieving 13 percent above market rate. Its MPI for the same month is 0.94, meaning slightly below fair share of room nights. RGI lands near 1.06: more than fair share of revenue, earned on rate rather than volume.
That is usually the healthier pattern of the two, because the rate premium came without extra rooms to service. Whether it is right depends on how far below 1.0 the MPI sits. A property at ARI 1.13 and MPI 0.94 is trading well. The same ARI at MPI 0.62 means the rate has moved outside the band its guests shop in.
The most useful diagnostic is comparing your ARI to what rate shopping told you to expect. If you publish rates level with your comp set but post an ARI of 0.88, something downstream is discounting: a channel promotion, a rate plan, a negotiated account, or a front desk matching prices on the phone. That gap between published and achieved is where a surprising amount of revenue leaks at independents.
Read it monthly, as a trend, against a comp set you have not changed.
Resources: Comp set · Dynamic pricing
Why ARI matters for independent hotels
Rate is the lever with no cost attached, so knowing whether you are winning on it matters more than knowing whether you are winning on volume.
ARI is also the number that tells an independent whether its positioning is real. Plenty of small properties describe themselves as the premium option locally and post an ARI of 0.97. The self-image and the achieved rate disagree, and the index is the only place that shows up.
The reverse case is more common and more expensive. A property that is genuinely the best in its set, with the best location and the strongest reviews, running at ARI 1.0 is leaving money on the table every single night. Matching the market average when your product is above market is a decision, even when nobody made it deliberately.
Resources: Revenue management for independent hotels
How to use ARI at your property
- Read it beside MPI, always. Rate share without volume share cannot tell you whether the premium is sustainable.
- Compare it to your published rates. A gap between what you advertise and what you achieve is a leak, and ARI is how you find it.
- Decide what your ARI ought to be. Based on product, location and reviews, is your property a 1.15 or a 0.90? Then check whether you are there.
- Trust it over MPI in a mixed-size comp set. Rate comparisons are less distorted by one large property.
- Watch the trend, not the month. Four months of direction against a fixed comp set.
- Check it by segment where you can. A falling ARI driven entirely by one growing corporate account is a contract problem, not a pricing one.
What ARI will not tell you
It ignores volume entirely. The simplest way to post a superb ARI is to price so high that only the least price-sensitive guests book, leaving most of the building empty. ARI will applaud that.
It says nothing about cost of sale. A $190 booking through an OTA at 18 percent commission and a $190 direct booking produce identical ARI and materially different outcomes.
And it cannot adjust for product quality. If your comp set includes two properties that are objectively worse than yours, your ARI should be above 1.0 and the index will not tell you by how much. That judgement stays yours.
How ampliphi approaches rate positioning
You choose up to five competitors to watch, and their rates appear in a view separate from the everyday rate suggestion. That suggestion is demand-based, built on your own booking pace and occupancy, and it covers the base rate plus the differential between room types.
Keeping the two apart is deliberate. Competitor rates are useful for understanding where you sit and for spotting a market-wide move. They are a poor input to your own price, because they anchor you to whoever nearby is discounting hardest, and in a soft market that compounds across a comp set quickly.
The room-type differential is worth noting here specifically, since a lot of achievable rate index goes missing at independents that price every category off a single base with fixed gaps. You approve every rate before it publishes.
Key takeaways: ARI
- ARI is your ADR divided by your comp set's. Above 1.0 means a higher achieved rate than the market.
- It measures achieved rate, not published. The gap between the two is where discounting hides.
- More reliable than MPI when your comp set has wide size variation.
- 1.0 is not the target. Decide what your product should command, then check whether you are there.
- Read it beside MPI. Rate share alone cannot tell you whether the premium is sustainable.
Frequently asked questions about ARI
Should I aim for an ARI above 1.0?
Only if your product justifies it, and for most properties the honest answer is that the right ARI is not 1.0.
Work out where you genuinely sit in your comp set on location, condition, reviews and room product. If you are clearly the strongest, your ARI should be meaningfully above 1.0 and sitting at parity means you are underpricing a better hotel. If you are the budget option among boutiques, an ARI of 0.82 may be exactly correct and pushing toward 1.0 would price you out of the guests you actually serve.
The trap is treating 1.0 as a pass mark. It is an average, and half the properties in any market should be below it by design.
Why is my ARI below 1.0 when my published rates match my competitors?
Because ARI measures what you achieved, not what you advertised, and the gap is almost always discounting you have stopped noticing.
The usual culprits: an OTA promotion still running after the campaign it was built for, a negotiated corporate rate taking more volume than expected, an advance-purchase rate priced too far below BAR, a long-stay discount, or front desk staff matching a rate a guest quotes on the phone.
Pull your achieved ADR by rate plan and by channel. The plan dragging the average down is usually obvious once the data is split, and it is rarely the one anybody suspected.
Is ARI or MPI more important?
Neither alone, but ARI is usually the better first read for an independent, for two reasons.
Rate carries no incremental cost, so an ARI gain flows to profit far more completely than an MPI gain. And ARI is less distorted by comp set composition, since occupancy indices get dominated by whichever property in the set has the most rooms.
That said, the pair is what informs a decision. ARI tells you whether the price is right. MPI tells you whether the market agreed. A property can be delighted with its ARI while emptying, and only MPI shows it.
How do I get competitor ADR data?
You cannot observe it directly, which is the central difficulty. Competitors publish rates. They do not publish what they achieved.
The reliable route is an anonymised benchmarking report such as an STR report, where participating properties submit actual data and receive comp set aggregates back. Local hotel associations sometimes run cheaper equivalents.
The approximation is rate shopping: track published rates for your comp set over time and use the average as a proxy. It will overstate their achieved ADR, because published rates ignore the discounting described above, so your estimated ARI will read low. Treat the trend rather than the level, and note on any report that the comp set figure is a published-rate proxy.
How often should I review ARI?
Monthly for the index itself, because that is the cadence benchmarking data arrives on and because shorter windows are too noisy at small room counts to act on.
Daily for the input, which is a different thing. Competitor published rates for future dates move constantly and those you can act on while the dates are still sellable. The index scores a period that has closed. Rate shopping informs a period that has not.
A useful rhythm is competitor rates weekly as part of the pricing routine, and ARI monthly as part of the performance review.
Related terms
RGI
Revenue Generation Index: your RevPAR divided by the comp set's. ARI and MPI decompose it between them, which is why a moving RGI should always send you to both components.
MPI
Market Penetration Index: your occupancy divided by the comp set's. ARI's counterpart, and the one that reveals whether a rate premium is costing you more volume than it is worth.
ADR
The average price achieved per room sold. The absolute figure ARI converts into a share-of-market question, and the number where achieved and published rates diverge.
Comp set
The four to six properties you genuinely compete with. ARI is more forgiving of size variation in that list than the occupancy indices, but a comp set of the wrong properties still produces a confident wrong answer.
Rate shopping
Checking competitors' published rates for future dates. The daily practice that sits beneath ARI, and the one that shows you asking prices rather than achieved ones.