14 Trade accounts receivable

CHF 1,000

2012

2013

Trade accounts receivable

  

Denominated in CHF

18,288

19,684

Denominated in EUR

22,046

20,538

Denominated in GBP

1,095

1,437

Denominated in USD

29,961

28,743

Denominated in JPY

3,862

1,035

Denominated in other currencies

4,908

4,486

Subtotal trade accounts receivable

80,160

75,923

   

Allowance for doubtful accounts

  

Individual impairment allowance account

(2,152)

(1,501)

Collective impairment allowance account

(58)

(38)

Subtotal allowance for doubtful accounts

(2,210)

(1,539)

   

Construction contracts in progress

  

Aggregate amount of cost incurred and recognized profits

19,553

476

Amounts of advances received

(15,111)

(208)

Subtotal construction contracts in progress

4,442

268

   

Balance at December 31

82,392

74,652

   

Increase/(decrease)

10,959

(6,538)

Acquisition through business combination

1,074

Translation differences

(1,550)

(1,202)

Total change compared with previous year

10,483

(7,740)

   

Amount of contract revenue recognized as sales in the

statement of profit or loss relating to construction contracts

4,810

6,842

The maximum exposure to credit risk for trade accounts receivable at the reporting date by geographic region was:

CHF 1,000

2012

2013

Switzerland (domestic)

2,817

3,645

Euro-zone countries

28,245

23,289

Other European countries

2,280

3,358

North America

35,307

34,385

Asia

9,531

9,286

Other

1,980

1,960

   

Balance at December 31

80,160

75,923

The Group’s most significant customer accounts for 6.1% of the trade accounts receivable carrying amount at December 31, 2013 (December 31, 2012: 6.1%).

The movement in the allowance for impairment in respect of trade accounts receivable during the year was as follows:

CHF 1,000

2012

2013

Individual impairment allowance account

  

Balance at January 1

(1,396)

(2,152)

Change in impairment losses

(1,118)

596

Write-offs

336

45

Translation differences

26

10

   

Balance at December 31

(2,152)

(1,501)

   

Amount of trade accounts receivable with individual impairment (gross)

2,174

1,918

   

Collective impairment allowance account

  

Balance at January 1

(47)

(58)

Change in impairment losses

(12)

21

Translation differences

1

(1)

   

Balance at December 31

(58)

(38)

The due dates of trade accounts receivable that are not individually impaired were:

 

2012

2013

CHF 1,000

Gross

Impairment

Gross

Impairment

Not past due

60,285

(41)

61,703

(25)

Past due 130 days

11,852

(14)

7,738

(11)

Past due 3190 days

3,970

(3)

4,234

(2)

Past due 91360 days

1,837

228

Past due more than one year

42

102

     

Balance at December 31

77,986

(58)

74,005

(38)

The Group did not experience any severe financial difficulties with its debtors in the past. The sum of all recognized final writeoffs of trade accounts receivable in 2012 and 2013 represents less than 1% of sales.