A cellar that stays in balance.

Planning a wine cellar sounds like a job for later, which is how so many cellars end up unplanned. The first cases are bought with care. After that, enthusiasm takes over: a strong vintage here, a merchant's offer there, a case of something admired at a dinner. Ten years on, the cellar holds plenty of wine and nothing to drink tonight. Or it holds three hundred bottles that all come ready in the same decade.

The fix is to buy to a plan, which rarely means buying less. A cellar in balance gives you good bottles every year: some ready now, some maturing, some held in reserve, spread across the occasions you actually have and the styles you actually drink. This guide is about what goes into the cellar rather than how to build the room. It picks up after the first twelve bottles, when twelve have become fifty and fifty are on their way to five hundred.

The arithmetic of planning a wine cellar

Start with one number: how many bottles you open in a year. A household that opens two bottles a week gets through about a hundred. Then estimate how long, on average, a bottle waits between arriving and being opened. Multiply the two and you have the size the cellar will settle at. A hundred bottles a year, each waiting five years on average, makes a cellar of about five hundred.

The most useful rule in cellar planning follows from that. Once the cellar reaches the size you want, buy at roughly the rate you drink. Buy faster and the cellar grows older and fuller than you can use, the average wait lengthens and more bottles slide past their best. Buy slower and the reserve runs down.

Balance across drinking windows

A balanced cellar has three bands: wines ready now, wines maturing and a long-term reserve. The right size for each depends on what you buy. The arithmetic shows why the long end takes more room than people expect.

Take, as an example rather than a rule, a collector who buys and drinks 100 bottles a year.

• 50 bottles bought ready to drink and opened, on average, a year after they arrive: around 50 on the racks at any time.
• 30 bottles bought to open in about five years: around 150 on the racks.
• 20 bottles bought for the long term and opened after about twelve years: around 240 on the racks.

That cellar settles at around 440 bottles. More than half of them are long-term wines, even though they are only a fifth of each year's buying. Every year, 50 ready bottles, 30 from the middle band and 20 from the reserve reach the table, so there is always something good to open and never everything at once.

A bottle bought for twenty years takes up space for twenty years.

The numbers are yours to change. The lesson is that every young classic bought for the long haul quietly claims a place for a decade or more, which is why a cellar grown on enthusiasm tends to be heavy at the long end and light on bottles to drink now. The plan also depends on every wine carrying a drinking window that you revise as you taste, recorded in an inventory you keep up to date.

Balance across occasions and styles

Drinking windows are one axis. The other is how you actually drink. Count your occasions honestly: how many quiet weeknights, how many dinners for six or eight, how many genuine celebrations in a year. Then compare that with the racks. A common imbalance is too few weeknight bottles and too many grand ones, so the grand ones sit untouched while the weeknights get whatever is to hand.

• Weeknight bottles are, for most people, the ones opened most often. They deserve to be good as well as affordable. Half bottles earn their place here.
• Dinner party wines should come in quantity: for a table of six or eight, one bottle of a wine is rarely enough.
• Celebration bottles should match the celebrations you really have. Five a year means five bottles, not fifty.

Styles need the same honesty. A cellar of reds alone ignores what many evenings call for, especially in a warm climate: whites, Champagne and the occasional sweet wine for the end of a dinner. A magnum pours about twelve glasses and ages more slowly than a bottle, which makes magnums and other large formats a natural fit for the long-term reserve, waiting for the large dinner they were bought for.

A buying rhythm

Set a yearly budget in bottles as well as money and decide in advance what it is for. Different parts of the cellar are best filled in different ways.

• The long end can be bought young, on release or en primeur where the case for it is real: scarce wines, large formats and runs of one estate's vintages.
• The near end is often best bought mature. Buying mature wine means someone else has done the waiting. It also gives a young cellar something to drink while its own wines grow up.
• The middle band fills naturally from recent releases and merchants' back vintages.

Then decide how many of each wine to buy. Six or twelve bottles let you follow a wine over time, opening one every year or two and watching it change. Singles are for curiosity: a region you are exploring or a producer you want to try before committing. A good shape for a mature cellar is mostly sixes and twelves of wines you know you like, with a margin of singles to keep learning.

Spread the risk

Concentration is the quiet enemy of balance.

• One vintage. A great year bought heavily comes ready all at once. Buying several vintages of a favourite wine spreads the same pleasure across many more years.
• One region. A cellar that is all Bordeaux or all Burgundy has one style and one set of risks. Collectors who loaded up on white Burgundy from the mid-1990s learned this the hard way when many bottles oxidised years early.
• One source. Buying everything from one merchant or in one campaign ties the whole cellar to a single relationship and a single set of paperwork.

Review, drink down or sell

Once a year, lay the inventory next to the plan. Look at the three bands, the occasions and the styles and note where the cellar has drifted. Then deal with the surplus: wines you no longer enjoy, wines you will not reach before they fade and runs of one wine far longer than you will ever drink.

Drinking down is the pleasant option. Open more of the surplus at dinners and give some away. Selling is the other. An auction house or a merchant who buys from private clients can take wine back into the market. Wine with clean storage records and invoices sells more easily. Selling has costs and takes time, so treat it as a way to rebalance the cellar rather than a reason to buy.

Write the plan down

A plan that lives in your head bends to every offer. One written page holds firm:

1. How many bottles you open a year and the size you are aiming for.
2. The split you want between ready, maturing and long-term wines, with your own numbers.
3. The occasions and styles the cellar must cover.
4. This year's budget and what each part of it is for.
5. What to drink down or sell this year.

Review it once a year and buy to it in between. If you would like help putting yours together, a cellar planning session ends in exactly this kind of written plan: what to buy first, what to wait for and what to open meanwhile.