Allowances and Alternates in Unit-Rate Bids

The base electrical package is almost ready to send. Raceway, devices, and the specified lay-in fixtures extend cleanly from the library. Then two notes arrive on the same morning. The architect still has six decorative pendants marked “owner to select.” The GC asks for a priced alternate if a wing of the suite has to hang after hours around a working tenant. Shops that keep a silent pad inside every rate cannot answer either note cleanly. Shops that keep named rates put an allowance on one line, an alternate on another, and still show which dollars belong to which choice.

This guide is that before-award moment on a commercial suite: what an allowance is, what a bid alternate is, and how both stay honest when the estimate is a book of quantity times named rate instead of a round lump. The through-line is the same illustrative vacant 4,200 square foot second-floor Class B office electrical package used in tenant improvement estimating. Every dollar below is an illustrative 2026 U.S. mid-market unit rate, not a real client quote. After award, a spent or converted allowance can become a change order against the awarded book. What follows is still in pursuit.

What an allowance is, and what a bid alternate is

An allowance is a stated hold on the offer for something the set has not finished deciding. The quantity basis is usually known — six pendants, a lighting-control package, a finish family — but the exact product, color, or fixture family is still open. You write the dollar, the unit, and the rule for converting the hold when the selection lands. The owner can see the money. The estimator can see the home it will convert into.

A bid alternate is a priced option the owner or GC may accept or decline before award. It is still pursuit work. It is not a change to a number someone already accepted. Alternates often flip a condition (after-hours occupied hang instead of vacant standard shift), raise a finish level (Level 5 conference room instead of Level 4), or upgrade a specified assembly (a higher fixture family on twelve of the forty-eight lay-ins). Each alternate should read as quantity times a named rate, or as the delta between two named rates, so the comparison stays on the same book as the base offer.

The two tools are easy to mash together. An allowance holds money for an open selection inside the base story. An alternate prices a choice the buyer can take or leave. If you bury both in one cell labeled “misc electrical,” the first week after award becomes an argument about who owned the pendants and who owed the night premium.

Named rates, not silent lumps

A unit-rate shop maps both tools the same way it maps every other line: measure what you can, name the rate that fits the condition, and extend. The allowance is not a different religion. It is a labeled line with a unit basis — each, linear foot, square foot — waiting for a final product. The alternate is not a different religion either. It is a second extension under a second condition or a second assembly name.

That is why proposal scope, inclusions, and exclusions matter on the same page. The owner-facing sentences have to say which lines are base, which line is an allowance, and which block is Alternate A. Quantity and unit belong in those sentences. “Power and lighting complete, plus eight thousand for lights” hides the hinge. “Forty-eight specified 2x4 LED lay-in at the library rate, plus a six-each decorative-pendant allowance at one hundred eighty-five dollars each” does not.

One simple check keeps the arithmetic honest: every priced line, allowance or alternate, still equals a quantity times a named rate (or a clear unit hold that will convert to one). Recovery — overhead and fee — sits once on the proposal, the same way it does on the base stack. Changing the recovery method because an allowance appeared is how the revised story stops matching the first send.

Allowance types you will see on a commercial TI

Finish selection is the common one. Tile, carpet, paint color, or a decorative lighting family is still open while raceway and devices are already measurable. Carry a stated allowance with a unit basis. When the selection lands, replace the hold with a named library rate and the final quantity. If the final extension is higher or lower than the hold, the offer (before award) or the change order (after award) shows the delta on that line.

Owner-furnished versus contractor-furnished fixtures is the next fork. Owner-furnished, contractor-installed work still needs a labor-and-hang rate; the material dollar is not yours to pad. Contractor-furnished, contractor-installed work needs both. Write OFCI or CFCI on the line so a PM does not buy the pendant twice or forget to hang the one the owner shipped.

Unforeseen existing conditions — especially above-ceiling MEP on a standing building — want one clear home. A stated allowance, a tagged contingency, or a clean exclusion. Pick one. The overhead, fee, and contingency stack keeps that split. Carrying a silent pad inside every raceway rate and also a contingency for the same hole is how a shop funds the same risk twice and still cannot point to a line when the ceiling opens.

An allowance is not a contingency. An allowance is a placeholder for work you expect to buy once someone chooses. A contingency is money you may spend on a named risk that may never become scope. Write one word or the other on the page. Silence is how both appear and neither is tracked.

Alternates as quantity times a named rate

Price the alternate the way you would price a second small estimate, not as a round add. After-hours occupied hang on a portion of the raceway is a condition-variant rate against the same linear feet. A Level 5 conference-room finish is a different gypsum rate on a measured wall area. A fixture upgrade is a higher each-rate on a counted subset of the fixture schedule. In every case the owner can see the quantity, the rate name, and the extension.

If the library has no after-hours occupied rate, do not hide a premium inside the vacant number. Create the condition-variant rate, or decline the alternate. A silent premium teaches the next estimator the wrong vacant unit and trains the owner to expect night work for day money.

Keep the base offer readable without the alternate. The alternate block should stand alone: what changes, what stays, and what the add (or deduct) is after the same recovery method. When the GC awards base plus Alternate A, the accepted baseline is that combined story — not the base alone with a handshake about nights.

Recovery stays the same on the proposal

On this electrical through-line the shop recovers 12% overhead on direct, then 8% fee on direct plus overhead. Library rates stay direct. Markup sits once on the proposal. Allowances that sit in the direct column take the same recovery. Alternate deltas take the same recovery. You do not create a third markup because the architect left a selection open.

That stability lets a GC compare your base send to your alternate without decoding a new theory of the job. The dollars move because quantity or condition moved. The method does not.

Worked story: base stack, one allowance, one alternate

Bid A is the electrical package on that illustrative vacant 4,200 square foot second-floor suite — Class B building, standard shift, raceway exposed and ≤10' above finish floor. The fixture family for the open office is specified. Six decorative pendants over the reception and small conference are still “owner to select.”

Base named rates and the pendant allowance:

Recovery on the proposal, matching the other guides:

• Overhead: 12% of $36,228.00 = $4,347.36
• Direct + overhead = $40,575.36
• Fee: 8% of $40,575.36 = $3,246.03
• Base electrical offer (with allowance): $43,821.39

The inclusion sentence names the three measured assemblies and the six-each pendant allowance with its unit hold. The exclusion list still leaves conductors, above-ceiling work, fire alarm, and after-hours occupied work out of the base total — because those packages were never in the named rates either.

Now the GC asks for Alternate A: after-hours occupied hang on 420 LF of raceway serving the conference wing, if the tenant stays in that wing during construction. The library has a matching condition-variant rate at $16.80 per LF. The vacant rate on those same feet stays $10.36. The alternate is the delta, not a new lump.

• Vacant extension on 420 LF: 420 × $10.36 = $4,351.20 (already inside the base raceway line)
• After-hours occupied extension: 420 × $16.80 = $7,056.00
• Alternate A direct delta: $7,056.00 − $4,351.20 = $2,704.80 (also 420 × $6.44)

Recovery on the alternate, same method:

• Overhead: 12% of $2,704.80 = $324.58
• Direct + overhead = $3,029.38
• Fee: 8% of $3,029.38 = $242.35
• Alternate A add: $3,271.73

If the owner awards base plus Alternate A, the accepted electrical number is $43,821.39 + $3,271.73 = $47,093.12. The scope sentence picks up after-hours occupied hang on 420 LF. The pendant allowance remains a labeled hold until the family is chosen. Nothing in that story required padding the vacant $10.36 or hiding night work inside “misc.”

When an allowance becomes a change order

Before award, a selection that lands simply revises the live offer: replace the allowance line with the named rate and quantity, re-extend, and recover the same way. After award, the accepted baseline includes the allowance dollar. When the owner finally picks a pendant family, you convert the hold against the awarded book. If six pendants at the final library rate extend higher than $1,110.00 direct, the overage — with the same 12% then 8% — is a change order against that line. If the final family comes in under the hold, the underage credits the same way.

That bridge is brief on purpose. The change-order guide owns the after-award sequence. A labeled allowance gives you a line to convert; an unlabeled pad inside every rate does not.

Common misses before award

Padding every rate instead of stating an allowance is the quietest miss. The vacant EMT rate grows “just in case” the pendants run rich, and the next suite inherits a dishonest vacant unit. State the hold. Leave the named rates clean.

An unlabeled “misc” or “lighting hold” without quantity or unit is the next miss. When the architect selects four pendants instead of six, nobody can defend the leftover dollars. Write the each-count and the convert-to-rate rule on the page.

Pricing an alternate without matching the condition is how night work gets bought for day money. If Alternate A is after-hours occupied, the rate name has to say so. A vacant extension with a round premium in the cover email is not an alternate. It is a future argument.

Double-counting contingency and allowance for the same hole funds the risk twice. Above-ceiling MEP is either excluded, carried as a stated allowance, or tagged as contingency — one home. The recovery stack already has a place for that choice; the unit library does not need a secret second place.

Sending the estimate as the proposal is still a miss when allowances and alternates are in play. $36,228.00 is a direct subtotal. The owner accepts $43,821.39 plus the sentences that name the pendant hold, and a separate Alternate A block at $3,271.73 if they want the night hang. Wage and burden rows stay in the library.

Keep the choices clear, then send them

Allowances and alternates test whether your rates were real. If the library names the assembly and the condition, an open selection becomes a labeled hold and an optional night package becomes a second extension. If the first offer was a round number with a hopeful paragraph, every selection and every alternate becomes a new scramble, and the pursuit stops being a book you can defend.

Unit Rate AI keeps a private unit-rate library and turns it into a branded proposal the owner can accept or decline. When the set leaves a finish open or the GC asks for a priced alternate, you extend the same named rates, label the hold, recover once, and send a clear offer — the same loop as the base bid, not a second spreadsheet that drifts from the first. If you want that library and that send on the next suite, see pricing.